Two-stage, drop-in trigger assembly
A trigger assembly for a firearm is disclosed wherein the firearm includes a receiver, a safety selector and a hammer. The trigger assembly includes a trigger having a pivot axis, a front hook which is constructed and arranged to move with trigger rotation, a rear hook which is cooperatively arranged with the front hook and a spring which is positioned between the front hook and the rear hook. The front hook and the trigger are constructed and arranged relative to the safety selector and relative to the hammer in order to allow the hammer to be recocked from an upright position with the safety selector in a “SAFE” position. This particular construction provides a trigger assembly which is constructed and arranged as a two-stage, drop-in trigger assembly which is compliant with the European Standard for an M4/M16 (AR) platform.
1. A trigger assembly for a firearm that includes a hammer, the trigger assembly comprising:
a trigger having a pivot axis, the trigger comprising a pulling surface for an operator to pull the trigger rearward in a triggering direction;
a disconnector that is rotatable relative to the trigger, wherein the disconnector comprises a rear hook that is spaced apart from and positioned behind the pivot axis, wherein the rear hook is adapted to hold the hammer in a cocked position after the firearm is fired until the trigger is released from being pulled in the triggering direction; and
a disconnector spring that biases the disconnector relative to the trigger, wherein the disconnector spring is spaced apart from and positioned in front of the pivot axis, on the opposite side of the pivot axis relative to the rear hook.
2. The trigger assembly of claim 1 , wherein the disconnector rotates about the pivot axis of the trigger.
3. The trigger assembly of claim 2 , wherein the disconnector spring is radially closer to the pivot axis than the rear hook.
4. The trigger assembly of claim 3 , further comprising a front hook, wherein the front hook comprises a front hook sear surface adapted to selectively engage the hammer to maintain the hammer in a cocked condition until the trigger is pulled in the triggering direction.
5. A trigger assembly for a firearm that includes a hammer, the trigger assembly comprising:
a trigger having a pivot axis, the trigger comprising a pulling surface for an operator to pull the trigger rearward in a triggering direction;
a disconnector that is rotatable relative to the trigger, wherein the disconnector comprises a rear hook that is spaced apart from and positioned behind the pivot axis, wherein the rear hook is adapted to hold the hammer in a cocked position after the firearm is fired until the trigger is released from being pulled in the triggering direction, wherein the disconnector rotates about the pivot axis of the trigger;
a disconnector spring that biases the disconnector relative to the trigger, wherein the disconnector spring is spaced apart from and positioned in front of the pivot axis, on the opposite side of the pivot axis relative to the rear hook and wherein the disconnector spring is radially closer to the pivot axis than the rear hook; and
a front hook, wherein the front hook comprises a front hook sear surface adapted to selectively engage the hammer to maintain the hammer in a cocked condition until the trigger is pulled in the triggering direction;
wherein the disconnector spring is positioned between the disconnector and the front hook.
6. The trigger assembly of claim 5 , wherein the trigger assembly is configured as a drop-in trigger assembly for an M4/M16(AR) platform.
7. The trigger assembly of claim 5 , wherein the front hook defines a slot that the disconnector passes through.
8. The trigger assembly of claim 5 , wherein the front hook is rotatable relative to the trigger and wherein the front hook selectively abuts the trigger so that the front hook selectively rotates with the trigger.
9. The trigger assembly of claim 8 , wherein the front hook rotates about the pivot axis of the trigger.
10. The trigger assembly of claim 9 , further comprising a pivot bushing that extend through the trigger, the disconnector and the front hook, wherein the pivot pushing defines the pivot axis of the trigger.
11. The trigger assembly of claim 5 , further comprising a trigger spring that resists pulling the trigger in the triggering direction.
12. A trigger assembly for a firearm that includes a hammer, the trigger assembly comprising:
a trigger having a pivot axis, the trigger comprising a pulling surface for an operator to pull the trigger rearward in a triggering direction;
a disconnector that is rotatable relative to the trigger, wherein the disconnector comprises a rear hook that is spaced apart from and positioned behind the pivot axis, wherein the rear hook is adapted to hold the hammer in a cocked position after the firearm is fired until the trigger is released from being pulled in the triggering direction; and
a disconnector spring that biases the disconnector relative to the trigger, wherein the disconnector spring is spaced apart from and positioned in front of the pivot axis, on the opposite side of the pivot axis relative to the rear hook;
wherein releasing the front hook sear surface from the hammer to release the hammer requires pulling the trigger in the triggering direction against the combined biasing force of both the trigger spring and the disconnector spring.
13. The trigger assembly of claim 1 , wherein the trigger assembly is configured as a drop-in trigger assembly for an M4/M16(AR) platform.
14. The trigger assembly of claim 1 , wherein the trigger defines a trough that houses a portion of the disconnector.
15. The trigger assembly of claim 14 , wherein at least a part of the disconnector spring extends outside of the trough.
16. The trigger assembly of claim 1 , wherein the disconnector selectively abuts the trigger so that the disconnector selectively rotates with the trigger.
17. The trigger assembly of claim 16 , wherein the disconnector abuts the trigger in front of the pivot axis.
18. The trigger assembly of claim 1 , wherein the trigger and the disconnector are constructed and arranged such that the hammer generates insignificant trigger slap during re-cocking of the hammer after firing.