A trigger mechanism that can be used in AR-pattern firearms has a hammer, a trigger member, a disconnector, a locking member, and a “three position” safety selector having safe, standard semi-automatic, and forced reset semi-automatic positions. In the standard semi-automatic position, rearward movement of the bolt carrier causes rearward pivoting of the hammer such that the disconnector hook catches the hammer hook, at which time a user must manually release the trigger member to free the hammer from the disconnector to permit the hammer and trigger member to pivot to the set positions so that the user can pull the trigger member to fire the firearm. In the forced reset semi-automatic position, rearward movement of the bolt carrier causes rearward pivoting of the hammer causing the trigger member to be forced to the set position, the safety selector preventing the disconnector hook from catching the hammer hook, and thereafter when the bolt carrier reaches the substantially in-battery position the user can pull the trigger member to fire the firearm without manually releasing the trigger member. The locking member is pivotable between a first position at which the locking member mechanically blocks the trigger member from moving to the released position and a second position at which the locking member does not mechanically block the trigger member allowing the trigger member to be moved to the released position. The locking member is spring biased toward the first position and moved against the spring bias to the second position by contact from the bolt carrier during forward movement of the bolt carrier as the bolt carrier reaches a substantially in-battery position.

A trigger assembly is disclosed. The trigger assembly contains a trigger containing an outer surface, a sear engagement member pivotally coupled with the outer surface of the trigger, and a spring member positioned between the outer surface and the sear engagement member.

A trigger assembly is disclosed. The trigger assembly contains a trigger containing an outer surface, a sear engagement member pivotally coupled with the outer surface of the trigger, and a spring member positioned between the outer surface and the sear engagement member.

A trigger assembly for a firearm includes a housing with an opening adapted to receive a trigger bar guide portion of a trigger bar. The opening includes a ridge that extends downward from an upper surface of the opening. The trigger bar guide is forced downward in the opening by a connector as the trigger is pulled to cause a first disconnect of a striker resulting in a first firing. Upon release of the trigger the trigger bar guide moves upward and upon return to a released position is forced downward to cause a secondary disconnect of striker resulting in a second firing.

A trigger assembly for a firearm includes a housing with an opening adapted to receive a trigger bar guide portion of a trigger bar. The opening includes a ridge that extends downward from an upper surface of the opening. The trigger bar guide is forced downward in the opening by a connector as the trigger is pulled to cause a first disconnect of a striker resulting in a first firing. Upon release of the trigger the trigger bar guide moves upward and upon return to a released position is forced downward to cause a secondary disconnect of striker resulting in a second firing.

Provided are multi-mode firearms, triggers, kits, and methods of use that allow a user to select between a semi-automatic firing mode and a pull-and-release firing mode that fires the firearm upon both pulling the trigger and releasing the trigger, by using the selector switch or other mechanism to change the amount the trigger can move. A safe mode that prevents the firearm from firing may also be selected in various example embodiments by using the selector switch or other mechanism to change the amount the trigger can move. In certain example embodiments the trigger cannot move at all in safe mode, can move more in semi-automatic mode, and can move yet more in pull-and-release mode. The modes can be positioned for selection in any order. Kits comprising a trigger assembly and a selector assembly are provided for retrofitting conventional semi-automatic firearms.

An operating system for a firearm includes a trigger, a hammer, a disconnector, a pivoting arm, and a lower member. The trigger includes a lower portion, an upper portion, and a trigger pivot. The disconnector includes a lower portion, an upper portion, and a disconnector pivot. The pivoting arm includes a forward protrusion, a pivoting arm opening, and a pin extending through the pivoting arm opening. The lower member includes a lower member opening and a pin hole that is coaxial with the trigger pivot and the disconnector pivot. At least a portion of the trigger and at least a portion of the disconnector are disposed within the lower member opening. Motion of the trigger causes the forward protrusion of the pivoting arm to engage a bolt carrier group and hold the bolt carrier group in an open position.

Trigger groups for semi-automatic firearms have a frame, a hammer connected to the frame and movable between a cocked position and a striking position, the hammer being biased toward the striking position, a trigger element connected to the frame and movable by a user between a forward position and a rearward position, a selector connected to the frame and movable between at least a first position and a second position, a disconnector having a hammer engagement facility adapted to selectably engage the hammer, a disconnector control element movable between a first control position and a second control position, the disconnector being operably engaged to the disconnector control element, the disconnector operable to move in a first range of motion when the disconnector control element is in the first control position, and in a second range of motion when the disconnector control element is in the second control position.

Trigger groups for semi-automatic firearms have a frame, a hammer connected to the frame and movable between a cocked position and a striking position, the hammer being biased toward the striking position, a trigger element connected to the frame and movable by a user between a forward position and a rearward position, a selector connected to the frame and movable between at least a first position and a second position, a disconnector having a hammer engagement facility adapted to selectably engage the hammer, a disconnector control element movable between a first control position and a second control position, the disconnector being operably engaged to the disconnector control element, the disconnector operable to move in a first range of motion when the disconnector control element is in the first control position, and in a second range of motion when the disconnector control element is in the second control position.

Trigger-cycled firearms have a frame, a barrel, a bolt assembly connected to the frame in registration with the barrel and operable to reciprocate between a retracted position and a forward battery position, a trigger lever connected to the frame and operable to move between a forward rest position and a rearward actuated position, and the trigger lever operably connected to the bolt to move the bolt from the forward battery position to the retracted position and to release the bolt to the forward battery position and discharge the firearm in response to movement of the trigger lever from the forward rest position to the rearward actuated position when the bolt is in the forward position. There may be a connector bar pivotally connected to the frame and operably engaged to the bolt assembly and to the trigger lever. The connector bar may be slidably connected to the bolt assembly.