A firearm operating system includes a housing, a central pivoting member disposed within the housing, a trigger including a portion disposed within the housing and a portion extending outside the housing such that the portion of the trigger within the housing includes a hole and at least one finger that extends in a first direction from the hole. Due to movement of the trigger, the at least one finger presses against the central pivoting member to cause the central pivoting member to rotate.

A magazine caseless weapon is disclosed and can be used for shooting using the caseless ammunition. The weapon includes a handguard or handguard with bipods, or gunstock, magazine, barrel, barrel latch, multifunctional cartridge, conical bushing of a receiver, the receiver, safety spring, safety, trigger guard with magazine box, trigger bar, trigger bar spring, magazine latch, axis, firing pin, spring of firing pin latch, firing pin latch, conical bushing of the bolt, bolt body, firing hammer, mainspring, mainspring latch, hunting or skeletal buttstock, threaded bushing for back plate screw, back plate or adjustable back plate, threaded bushing of bipods, cross screw, cross screw nut, upper screw, lower screw, caseless ammunition, dowel screw, dowel screw nut, latch of adjustable back plate, adjustable cheek piece, latch of adjustable cheek piece, stop, stop lock, threaded bushing of stop lock, lower part, upper part and screw of muzzle break, folding adjustable bipod, and bipod latch.

A magazine caseless weapon is disclosed and can be used for shooting using the caseless ammunition. The weapon includes a handguard or handguard with bipods, or gunstock, magazine, barrel, barrel latch, multifunctional cartridge, conical bushing of a receiver, the receiver, safety spring, safety, trigger guard with magazine box, trigger bar, trigger bar spring, magazine latch, axis, firing pin, spring of firing pin latch, firing pin latch, conical bushing of the bolt, bolt body, firing hammer, mainspring, mainspring latch, hunting or skeletal buttstock, threaded bushing for back plate screw, back plate or adjustable back plate, threaded bushing of bipods, cross screw, cross screw nut, upper screw, lower screw, caseless ammunition, dowel screw, dowel screw nut, latch of adjustable back plate, adjustable cheek piece, latch of adjustable cheek piece, stop, stop lock, threaded bushing of stop lock, lower part, upper part and screw of muzzle break, folding adjustable bipod, and bipod latch.

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.

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.

Provided is a trigger mechanism having a trigger member is pivotally supported by a housing and having a forwardly extending finger portion and an actuation blade portion and a sear fixed in position relative to each other. A hammer pivotally supported inside the housing has a tooth and a disconnector has hook portion. A safety selector movable between safe and fire positions has a first surface that confronts the finger portion to block pivotal movement of the trigger member when in the safe position and a recess that receives the finger portion and allows movement of the trigger member when in the fire position. When the trigger member is pulled, cycling of the firearm action pivots the hammer to engage the tooth with the hook portion and hold the hammer until the trigger member is released to allow the sear to engage the hammer as the hook releases the tooth.

Provided is a trigger mechanism having a trigger member is pivotally supported by a housing and having a forwardly extending finger portion and an actuation blade portion and a sear fixed in position relative to each other. A hammer pivotally supported inside the housing has a tooth and a disconnector has hook portion. A safety selector movable between safe and fire positions has a first surface that confronts the finger portion to block pivotal movement of the trigger member when in the safe position and a recess that receives the finger portion and allows movement of the trigger member when in the fire position. When the trigger member is pulled, cycling of the firearm action pivots the hammer to engage the tooth with the hook portion and hold the hammer until the trigger member is released to allow the sear to engage the hammer as the hook releases the tooth.

A firearm comprises a lower frame with a fire control assembly connected to the lower frame. The fire control assembly includes a hammer, and the hammer has a first end pivotally connected to the frame. The hammer has an intermediate pivot connection. A link has a first end connected to the intermediate pivot connection and an opposed second end. The sled is connected to the second end of the link and operable to reciprocate with respect to the frame.

A firearm comprises a lower frame with a fire control assembly connected to the lower frame. The fire control assembly includes a hammer, and the hammer has a first end pivotally connected to the frame. The hammer has an intermediate pivot connection. A link has a first end connected to the intermediate pivot connection and an opposed second end. The sled is connected to the second end of the link and operable to reciprocate with respect to the frame.

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.