3 is a right-side view of the trigger assembly 150 of the aspect of FIG. 1, with the trigger bar 210 depicted in the intermediate position. The trigger assembly 150 can comprise the trigger bar 210, the trigger 214, a trigger biasing member 316, a trigger housing 318, a disconnector 320, a disconnector locking piece 322, the sear 362, a sear pin 364, and a sear biasing member 462 (shown in FIG. 4).

The trigger 214 can define a pin opening 386, which can receive the trigger hinge pin 152 (shown in FIG. 1). The trigger 214 can rotate, or hinge, about the trigger hinge pin 152 with respect to the frame 102 (shown in FIG. 1). The trigger biasing member 316 can bias the trigger 214 about the trigger hinge pin 152 towards the forward position shown and discussed above with respect to FIG. 2. In the present aspect, the trigger biasing member 316 can bias the trigger 214 in a counterclockwise direction about the trigger hinge pin 152 with respect to the present viewing angle. In the present aspect, the trigger biasing member 316 can be a torsion spring; however, in some aspects, the trigger biasing member 316 can be a different type of biasing member, such as a tension spring, a compression spring, or any other suitable biasing member.

A front end 330 of the trigger bar 210 can be pinned to the trigger 214 by a pin 392. The biasing force exerted by the trigger biasing member 316 can pull the trigger bar 210 in the forward direction as the trigger 214 rotates about the trigger hinge pin 152 within the frame 102 (shown in FIG. 1). The ramped tab 212 can be positioned proximate to the front end 330 of the trigger bar 210.

The trigger 214 can comprise a trigger body 314 and a trigger safety blade 315. The trigger safety blade 315 can be fixed to the trigger body 314 by a pin 390. The trigger safety blade 315 can be configured to rotate relative to the trigger body 314 about the pin 390. The trigger safety blade 315 can define a first end 380 and a second end 382. The trigger safety blade 315 is shown in a safe position. In the safe position, the first end 380 can extend outward from a face 384 of the trigger body 314 in a forward direction, and the second end 382 can extend outward from a rear 355 of the trigger body 314. The second end 382 can engage with the frame 102 (shown in FIG. 1) to prevent the trigger body 314 from being depressed towards the frame 102 when the trigger safety blade 315 is in the safe position. When a user presses on the face 384 of the trigger body 314, the first end 380 can be pressed into the trigger body 314, thereby causing the trigger safety blade 315 to rotate about the pin 390 in a clockwise direction with respect to the present viewing angle to a firing position. The rotation of the trigger safety blade 315 can cause the second end 382 to retract into the trigger body 314, thereby disengaging the second end 382 from the frame 102 and allowing the trigger body 314 to be depressed towards the frame 102 to fire the firearm 100 (shown in FIG. 1).

The trigger housing 318 can define a trigger housing pin hole 354, which can receive the trigger housing pin 154 (shown in FIG. 1) when the trigger housing 318 is installed in the frame 102.

The disconnector 320 can be coupled to the trigger housing 318. The trigger housing 318 can define a disconnector mounting recess 356, which can receive the disconnector 320. In the present aspect, a lower arm 357 of the disconnector 320 can be received in the disconnector mounting recess 356. In some aspects, the disconnector locking piece 322 can secure the disconnector 320 in the disconnector mounting recess 356. In some aspects, the trigger assembly 150 can omit the disconnector locking piece 322. For example and without limitation, in some aspects, the disconnector mounting recess 356 can be a slot or hole, and the disconnector 320 can stab directly into the disconnector mounting recess 356. An upper arm 358 of the disconnector 320 can engage with a rear end 332 of the trigger bar 210. The upper arm 358 can be configured to resiliently deflect during operation of the firearm 100 (shown in FIG. 1) from a default arm shape (shown in FIGS. 3, 4, 6-8, and 11) and a disconnected arm shape (shown in FIGS. 13 and 14).

The trigger bar 210 can define a slot 334 extending into the rear end 332 of the trigger bar 210 and extending forwards towards the front end 330 of the trigger bar 210. The slot 334 can split the rear end 332 into an upper leg 336 and a lower leg 338.

The trigger housing 318 can define a guide shelf 324. The rear end 332 can ride along the guide shelf 324 as the trigger bar 210 moves in the forward and rearward directions. In the present aspect, the lower leg 338 can ride on the guide shelf 324. In some aspects, the guide shelf 324 can fit into the slot 334, and the slot 334 can ride along the guide shelf 324. In the aspect shown, the lower leg 338 can define a cutout 335 with a shoulder 337 proximate to the rear end 332, and the cutout 335 can ride along the guide shelf 324. In some aspects, the shoulder 337 can be positioned to limit rearward travel of the trigger bar 210, which can reduce or substantially eliminate overtravel of the trigger 214 when pulled by a user.

The upper leg 336 can engage with the disconnector 320 at the rear end 332 of the trigger bar 210. As described in greater detail below, the disconnector 320 and the upper leg 336 of the trigger bar 210 can be configured to resiliently deflect during operation of the firearm 100 (shown in FIG. 1) from a default leg shape (shown in FIGS. 3, 4, 6-9, and 11) and a disconnected leg shape (shown in FIGS. 13 and 14). The lower leg 338 can brace against the trigger housing 318, and the upper leg 336 can function as a leaf spring as described in greater detail below with respect to FIGS. 11-14.

The upper leg 336 can define a sear engagement surface 340, which can be configured to engage a trigger bar engagement surface 342 of the sear 362 when the trigger bar 210 is in the intermediate position, as shown. The sear 362 can be secured to the trigger housing 318 with the sear pin 364. The sear 362 can be configured to rotate about the sear pin 364. Engagement between the sear engagement surface 340 and the trigger bar engagement surface 342 can cause the sear 362 to rotate about the sear pin 364 when the trigger 214 is pulled and the trigger bar 210 is moved from the intermediate position to the rearward position, as further described below with respect to FIG. 9.

FIG. 4 is a perspective exploded view of the trigger assembly 150 of FIG. 1.

The trigger bar 210 can define a central bent portion 410 positioned between the front end 330 and the rear end 332. The central bent portion 410 can bow outwards from the ends 330, 332 in a lateral direction towards the right side 130 of the firearm 100. The central bent portion 410 provide clearance for the magazine 199 of the firearm 100 (shown in FIG. 1).

The trigger body 314 can define an upper slot 414 and a lower slot 415. The upper slot 414 can receive the front end 330 of the trigger bar 210, which can be secured by the pin 392 as described above. The lower slot 415 can receive the trigger safety blade 315, which can be secured by the pin 390 as described above. The trigger 214 can further comprise a blade safety biasing member 416, which can fit between the trigger blade safety 315 and the trigger body 314. The blade safety biasing member 416 can bias the trigger safety blade 315 towards the safe position discussed above with respect to FIG. 2.

The trigger body 314 can define a trigger biasing member boss 420. In the present aspect a coil 418 of the trigger biasing member 316 can fit over the trigger biasing member boss 420. The trigger hinge pin 152 (shown in FIG. 1) can extend through the trigger biasing member boss 420 and through the coil 418 when the trigger assembly 150 is installed into the frame 102 (shown in FIG. 1).

The sear 362 can define a sear pin hole 464, which can receive the sear pin 364. The trigger assembly 150 can further comprise the sear biasing member 462. The sear biasing member 462 can be received within the trigger housing 318. The sear biasing member 462 can bias the sear 362 to rotate about the sear pin 364 towards an engagement sear position. In the engagement sear position, the sear 362 can be positioned to engage the sear engagement lug 262 (shown in FIG. 2) of the striker 254 (shown in FIG. 2) to secure the striker 254 in the cocked position.

The lower arm 357 of the disconnector 320 can be shaped to wrap around a rear surface of the trigger body 314. The upper arm 358 of the disconnector 320 can define a front portion 440, a rear portion 444, and an angled portion 442. The front portion 440 and the rear portion 444 can be substantially parallel to one another. The angled portion 442 can extend laterally outwards towards the right side 130 of the firearm 100 (shown in FIG. 1), and the rear portion 444 can be positioned closer to the right side 130 than the front portion 440.

The trigger bar 210 can define a disconnector engagement tab 432 at the rear end 332. The disconnector engagement tab 432 can be positioned above the sear engagement surface 340. The disconnector engagement tab 432 can extend upwards from the upper leg 336. The disconnector engagement tab 432 can engage with the rear portion 444 of the upper arm 358 of the disconnector 320.

The upper leg 336 of the trigger bar 210 is shown in the default leg shape. In the default leg shape, the upper leg 336 can be positioned directly above and in alignment with the lower leg 338.

FIG. 5 is a perspective view of the sear 362 of the trigger assembly 150 of FIG. 1.

The sear 362 can define a main sear body 510 and a trigger bar engagement arm 550. The main sear body 510 can define a front end 512 and a rear end 514. The front end 512 can be defined opposite from the rear end 514. The main sear body 510 can define a right side 516 and a left side 616 (shown in FIG. 6). The main sear body 510 can define a top side 518 and a bottom side 520.

The sear pin hole 464 can extend through the main sear body 510 from the right side 516 to the left side 616. The sear pin hole 464 can define a sear axis 501 extending in the lateral direction, and the sear 362 can be configured to rotate about the sear axis 501. As demonstrated by the right side 516, each of the sides 516, 616 can define a raised boss 564 extending around the sear pin hole 464. Each of the raised bosses 564 can define a smooth bearing surface 565. The bearing surfaces 565 can facilitate rotational movement between the sear 362 and adjacent structures, such as the trigger housing 318 (shown in FIG. 3).

The sear axis 501 can extend through a center of mass of the sear 362, and the sear 362 can be neutrally weighted about the sear axis 501. This can be advantageous because if the firearm 100 (shown in FIG. 1) is exposed to an external force, such as from the impact of being dropped on a hard surface, the sear 362 will not be biased to rotate about the sear axis 501 on the sear pin 364 as a result of this force, thereby preventing the sear 362 from inadvertently releasing the striker 254 (shown in FIG. 2) due to impact.

The main sear body 510 can define a front portion 522 between the front end 512 and the sear axis 501, and the main sear body 510 can define a rear portion 524 between the rear end 514 and the sear axis 501.

The rear portion 524 can define a spring notch 562. The spring notch 562 can be positioned along the bottom side 520. The spring notch 562 can be configured to receive the sear biasing member 462 (shown in FIG. 4). The sear biasing member 462 can bias the sear 362 to rotate about the sear axis 501 in a clockwise direction when the sear 362 is viewed from the right side 516.

The rear portion 524 can define a striker engagement shoulder 554. The striker engagement shoulder 554 can be defined along the top side 518. The striker engagement shoulder 554 can be configured to selectively engage with the sear engagement lug 262 of the striker 254 to maintain the striker 254 in the cocked position.

The trigger bar engagement arm 550 can extend laterally outward from the main sear body 510. In some aspects, the trigger bar engagement arm 550 can extend outward from the main sear body 510 in a direction substantially parallel to the sear axis 501. In the present aspect, the trigger bar engagement arm 550 can extend outwards from the rear portion 524 and/or the rear end 514 of the main sear body 510. In the present aspect, the trigger bar engagement arm 550 can extend laterally outwards from the right side 516 of the main sear body 510. The trigger bar engagement arm 550 can define an end 552 positioned opposite from the main sear body 510.

The end 552 of the trigger bar engagement arm 550 can define a raised rib 542. The raised rib 542 can define the trigger bar engagement surface 342. The raised rib 542 can extend upwards and forwards from the end 552. The trigger bar engagement arm 550 can define a reset notch 544 positioned between the end 552 and the main sear body 510. In the present aspect, the reset notch 544 can be defined between the raised rib 542 and the right side 516 of the main sear body 510.

FIG. 6 is a rear view of the trigger assembly 150 of FIG. 1 with the trigger housing 318 hidden from view. In the present view, the trigger 214 and the trigger bar 210 in their respective forward positions. The upper leg 336 and the upper arm 358 can be in their respective default shapes, in which the front portion 440 and the rear portion 444 of the upper arm 358 and a portion of the upper leg 336 positioned at the rear end 332 of the trigger bar 210 can each be oriented substantially parallel to the forward direction 200 and/or the barrel axis 201 (forward direction 200 and barrel axis 201 shown in FIG. 2). In default leg shape of the upper leg 336, the upper leg 336 can be positioned directly over the lower leg 338, and the rear end 332 of the upper leg 336 of the trigger bar 210 can be laterally aligned with the raised rib 542 at the end 552 of the trigger bar engagement arm 550 of the sear 362.

The front portion 440 of the disconnector 320 can be laterally aligned to the left of the disconnector engagement tab 432 of the upper leg 336. The angled portion 442 of the disconnector 320 can extend laterally to the right to position the rear portion 444 of the disconnector 320 to the right of the disconnector engagement tab 432. The disconnector engagement tab 432 and the rear portion 444 of the disconnector 320 can be positioned in facing engagement.

The sear biasing member 462 can exert an upward force F on the rear portion 524 of the main sear body 510, which can bias the sear 362 to rotate about the sear pin 364 to the engagement sear position shown. In the engagement sear position, a striker engagement surface 662 of the sear 362 can engage the sear engagement lug 262 of the striker 254 to secure the striker 254 in the cocked position, as shown in FIG. 7.

FIG. 7 is a right-side perspective view of the firearm 100 of FIG. 1 with the slide 104 (shown in FIG. 1) removed from view and the frame 102 illustrated in transparency. The trigger bar 210 is shown in the forward position. In the forward position, the sear engagement surface 340 of the trigger bar 210 can be spaced forward and apart from the trigger bar engagement surface 342 of the sear 362.

As similarly discussed above, pressing the trigger 214 (shown in FIG. 2) can cause the trigger 214 to pivot and the trigger bar 210 to move rearward in a rearward direction 700 to the intermediate position of the trigger 214, shown in FIG. 8, wherein the sear engagement surface 340 of the trigger bar 210 can initially contact the trigger bar engagement surface 342 of the sear 362. During rearward travel in the rearward direction 700, the disconnector engagement tab 432 (shown in FIG. 6) of the trigger bar 210 can slide along the rear portion 444 of the disconnector 320 while maintaining facing engagement with the disconnector 320.

FIG. 8 is a right-side perspective view of the firearm 100 of FIG. 1 with the slide 104 (shown in FIG. 1) removed from view and the frame 102 illustrated in transparency. The trigger bar 210 is shown in the intermediate position. In the intermediate position, the sear engagement surface 340 of the trigger bar 210 can be in facing engagement with the trigger bar engagement surface 342 of the sear 362, and the sear 362 remains in the engagement sear position wherein the striker engagement surface 662 of the sear 362 can engage the sear engagement lug 262 of the striker 254 to retain the striker 254 in the cocked position, as shown.

With the trigger bar 210 in the intermediate position, further pressing the trigger 214 (shown in FIG. 2) can cause the trigger bar 210 to move further rearward in the rearward direction 700 towards the rearward position (shown in FIG. 9). As the trigger bar 210 moves from the intermediate position to the rearward position, the angled engagement between the sear engagement surface 340 of the trigger bar 210 and the trigger bar engagement surface 342 of the sear 362 can cause the sear 362 to rotate about the sear pin 364 (shown in FIG. 3), which in turn can cause the trigger bar engagement arm 550 and the rear portion 524 of the main sear body 510 to rotate downwards to a disengaged sear position of the sear 362, as shown in FIG. 9.

FIG. 9 is a right-side perspective view of the firearm 100 of FIG. 1 with the slide 104 (shown in FIG. 1) and the disconnector 320 (shown in FIG. 3) removed from view and the frame 102 illustrated in transparency. The trigger bar 210 of the trigger assembly 150 is shown in the rearward position with the upper leg 336 in the default leg shape. The sear 362 is shown in the disengaged sear position.

As the trigger bar engagement arm 550 and the rear portion 524 of the main sear body 510 rotate downwards to the disengaged sear position of the sear 362, the striker engagement surface 662 of the sear 362 can slide downwards and disengage from the sear engagement lug 262 of the striker 254, thereby releasing the striker 254 and placing the fire control mechanism 250 in a fired configuration. In the fired configuration of the fire control mechanism 250, the striker 254 has been released by the sear 362 and travelled in the forward direction 200 to a striking position under force provided by the striker biasing member 270. In the striking position, the firing pin 260 of the striker 254 can strike and detonate a primer of a cartridge (not shown) positioned within the barrel 106 (shown in FIG. 1), thereby causing the cartridge to fire.

In the fired configuration, the trigger bar 210 is in the rearward position with the upper leg 336 in the default leg shape, wherein the sear engagement surface 340 of the trigger bar 210 remains in contact with the trigger bar engagement surface 342 of the sear 362. Through contact between the sear engagement surface 340 and the trigger bar engagement surface 342, the upper leg 336 can hold the sear 362 in the disengaged sear position by overcoming the upward force F (shown in FIG. 6) exerted on the rear portion 524 of the sear 362 by the sear biasing member 462 (shown in FIG. 4). The firearm 100 cannot fire again until the fire control mechanism 250 is reset to the cocked configuration as described below with respect to FIGS. 11-14.

FIG. 10 is a right-side detail view of the rear portion 524 of the sear 362. The shape of the striker engagement surface 662 can be specifically shaped to provide a crisp trigger break when pulling the trigger 214 (shown in FIG. 2) to reposition the trigger bar 210 (shown in FIG. 2) from the intermediate position to the rearward position, thereby firing the firearm 100 (shown in FIG. 1).

The striker engagement surface 662 can define a primary engagement region 1010 and a secondary engagement region 1020. The striker engagement surface 662 can define a transition point 1015 between the primary engagement region 1010 and the secondary engagement region 1020. The primary engagement region 1010 can extend between an initial engagement point 1011 and the transition point 1015. The secondary engagement region 1020 can extend between the transition point 1015 and a final engagement point 1021.

A radius R can be measured between the striker engagement surface 662 and the sear axis 501 (illustrated coming out of the page). Radius R₀can correspond to the radius measurement at the initial engagement point 1011. Radius R₁can correspond to the radius measurement at the transition point 1015. Radius R₂can correspond to the radius measurement at the final engagement point 1021. An angle θ can be measured in a clockwise direction from radius R₀(i.e. value of angle θ at radius R₀is zero, and the value of angle θ increases towards radius R₁and then radius R₂). In some aspects, the value of the angle θ between radius R₀and radius R₁(θ_0,1) can be less than the value of the angle θ between radius R₁and radius R₂(θ_1,2), such that the primary engagement region 1010 can be smaller than the secondary engagement region 1020. In some aspects, the angle θ between radius R₀and radius R₁(θ_{0, 1}) can be substantially the same as the angle θ between radius R₁and radius R₂(θ_1,2). In some aspects, the value of the angle θ between radius R₀and radius R₁(θ_0,1) can be larger than the value of the angle θ between radius R₁and radius R₂(θ_1,2), such that the primary engagement region 1010 can be larger than the secondary engagement region 1020.

The radius R can increase in length over the primary engagement region 1010 as the angle θ increases from the initial engagement point 1011 to the transition point 1015 (i.e. Radius R₁>Radius R₀). In some aspects, the rate at which the radius R increases from the initial engagement point 1011 to the transition point 1015 can increase or remain constant. For example, if radius R is a function of angle θ (R(θ)), the first derivative of the function (R′(θ)) can have a positive value for the primary engagement region 1010 signifying that the radius R is increasing as angle θ increases, and the second derivative of the function (R″(θ)) can be greater than or equal to zero, signifying that as the angle θ increases, the radius R increases at an increasing or constant rate.

The radius R can increase in length over the secondary engagement region 1020 as the angle θ increases from the transition point 1015 to the final engagement point 1021 (i.e. Radius R₂>Radius R₁). However, the rate at which the radius R increases from the transition point 1015 to the final engagement point 1021 can decrease. Similar to the primary engagement region 1010, if radius R is a function of angle θ (R(θ)), the first derivative of the function (R′ (θ)) can have a positive value for the secondary engagement region 1020 signifying that the radius R is increasing as angle θ increases, but the second derivative of the function (R″ (θ)) can have a negative value signifying that as the angle θ increases, the radius R increases at a decreasing rate.

With the trigger bar 210 in the forward or intermediate positions, contact between the sear engagement lug 262 (shown in FIG. 2) and the striker engagement surface 662 can occur in the primary engagement region 1010 between the initial engagement point 1011 and the transition point 1015. In some aspects, the contacting portions of the sear engagement lug 262 and the primary engagement region 1010 can be almost or substantially parallel to one another, such that the force exerted on the sear engagement lug 262 can be substantially parallel to the forward direction 200 (shown in FIG. 2). Preferably, contact between the sear engagement lug 262 and the striker engagement surface 662 can occur at or proximate to the transition point 1015.

As the trigger 214 (shown in FIG. 2) is pulled and the trigger assembly 150 transitions from the intermediate position towards the rearward position, the trigger 214 can “break” and contact between the sear engagement lug 262 and the striker engagement surface 662 can migrate from the primary engagement region 1010 into and across the secondary engagement region 1020 towards the final engagement point 1021. Once the sear engagement lug 262 slips off the final engagement point 1021, the striker 254 (shown in FIG. 2) can be released to travel forwards as described above.

However, because the radius R increases from the initial engagement point 1011 to the final engagement point 1021, the striker 254 subtly moves rearward and subtly further compresses the striker biasing member 270 (shown in FIG. 2), thereby requiring more energy to be put into the striker biasing member 270 to successfully discharge the firearm 100. This is sometimes referred to as “positive engagement,” and can help prevent accidental disengagement between the sear 362 and the striker 254, such as due to dropping the firearm 100, because the striker biasing member 270 subtly biases the sear 362 to rotate about the sear axis 501 towards the engagement sear position (clockwise with respect to the present viewing angle).

Large regions of positive sear engagement can be desirable for safety purposes but often result in large amounts of trigger creep, wherein the shooter feels the sensation that the trigger is slowly dragging through the breaking point before a firearm discharges rather than a quick, crisp break as the trigger is pulled.

In the some aspects, the first derivative of the function (R′ (0)) can substantially decrease in value (while remaining positive) at the transition point 1015. The maximum pull force required when pulling the trigger 214 to actuate the fire control mechanism 250 can occur when the sear engagement lug 262 is sliding over the transition point 1015. While the positive engagement provided between the sear engagement lug 262 and the secondary engagement region 1020 of the striker engagement surface 662 still require more energy be put into the trigger assembly 150 through the form of work performed by the user's trigger finger, the decrease in trigger pull weight the secondary engagement region 1020 after peaking at the transition point 1015 results in the user's trigger finger naturally following through the remainder of the engagement provided by the secondary engagement region 1020. This arrangement can provide the sensation to the shooter that the trigger assembly 150 “breaks” the shot once the sear engagement lug 262 slides over the transition point 1015 when in fact the striker 254 is not released until after the sear engagement lug 262 slides off the final engagement point 1021. Because the primary engagement region 1010 is relatively small compared to the secondary engagement region 1020 and initial contact preferably occurs at or near the transition point 1015, this arrangement provides the sensation of a short, crisp break in the trigger pull while maintaining a large positive engagement region between the sear 362 and the striker 254.

One method of changing the pull weight profile of the trigger assembly 150 is to utilize various aspects of the sear 362 and the trigger bar 210 (shown in FIG. 2) with sear engagement surface 340 and the trigger bar engagement surface 342 provided at different complimentary angles. The more upright the angle of these surfaces 340, 342 (i.e. the closer to perpendicular to the forward direction 200), the heavier the peak trigger pull weight will be. The closer to horizontal the angle of these surfaces 340, 342 (i.e. closer to parallel to the forward direction 200), the lighter the peak trigger pull weight will be.

Pull weight profile of the trigger assembly 150 can also be adjusted via replacement of the trigger biasing member 316 (shown in FIG. 3) and the sear biasing member 462 (shown in FIG. 4). The trigger biasing member 316 can resist travel of the trigger bar 210 in the rearward direction 700 (shown in FIG. 7) from the forward trigger bar position to the rearward trigger bar position, and the trigger biasing member 316 can reset the trigger bar 210 from the rearward trigger bar position to the intermediate trigger bar position, the forward trigger bar position, or a position therebetween. The sear biasing member 462 can resist rotation of the sear 262 (shown in FIG. 2) from the engagement sear position to the disengaged sear position, which in turn can resist rearward movement of the trigger bar 210 from the intermediate trigger bar position to the rearward trigger bar position.

By replacing the trigger biasing member 316 and the sear biasing member 462 with lighter or heavier springs, the pull weight profile can be adjusted to provide a different feel for the user without compromising function of the firearm 100. For example, a user desiring a very light trigger pull, the trigger assembly 150 can be fit with both a lightweight trigger biasing member 316 and a lightweight sear biasing member 462, which provides both a light take up from the forward trigger bar position to the intermediate trigger bar position and a light break from the intermediate trigger bar position to the rearward trigger bar position.

For someone desiring a heavy trigger pull, the trigger assembly 150 can be fit with both a heavyweight trigger biasing member 316 and a heavyweight sear biasing member 462, which provides both a heavy take up from the forward trigger bar position to the intermediate trigger bar position and a heavy break from the intermediate trigger bar position to the rearward trigger bar position.

For someone desiring a two-stage trigger pull profile, the trigger assembly 150 can be fit with a lightweight trigger biasing member 316 and a heavyweight sear biasing member 462, which provides a light take up from the forward trigger bar position to the intermediate trigger bar position and a well-defined break from the intermediate trigger bar position to the rearward trigger bar position.

For someone desiring a trigger pull profile more similar in feeling to a traditional double-action, the trigger assembly 150 can be fit with a heavyweight trigger biasing member 316 and a lightweight sear biasing member 462, which provides a relatively consistent pull from the forward trigger bar position to the rearward trigger bar position and minimizes the difference in pull weight between the take-up from the forward trigger bar position to the intermediate trigger bar position and the break between the intermediate trigger bar position and the rearward trigger bar position.

These examples for adjusting the pull weight profile are merely exemplary and should not be viewed as limiting. Each of the trigger biasing member 316 and the sear biasing member 462 can be provided in various spring rates and are not limited to the lightweight and heavyweight examples referenced above.

FIGS. 11-14 demonstrate a method by which the fire control mechanism 250 can reset following the discharge of the firearm 100 from the fired configuration the cocked configuration.

FIG. 11 is a detailed cross-sectional view of the firearm 100 taken along Line 11-11 shown in FIG. 1. The trigger assembly