Abstract: Firearm trigger mechanisms with rotatable linkage members and associated systems and methods are disclosed herein. A firearm trigger assembly configured in accordance with embodiments of the present technology can include, for example, a trigger, first and second linkage members, and a sear. The first linkage member, second linkage member, and sear are arranged in an over-center configuration that securely locks the sear in a first position. Pulling on the trigger causes the trigger to rotate about a fixed pivot point and push on one of the two linkage members, forcing the linkage members and the sear out of the over-center configuration. The force from a striking mechanism forces the sear and the linkage members into a collapsed configuration, releasing the striking mechanism and firing the firearm. This two toggle configuration of the trigger assembly provides crisp and reliable release of the firearm.

Abstract: Firearm trigger mechanisms with rotatable linkage members and associated systems and methods are disclosed herein. A firearm trigger assembly configured in accordance with embodiments of the present technology can include, for example, a trigger, first and second linkage members, and a sear. The first linkage member, second linkage member, and sear are arranged in an over-center configuration that securely locks the sear in a first position. Pulling on the trigger causes the trigger to rotate about a fixed pivot point and push on one of the two linkage members, forcing the linkage members and the sear out of the over-center configuration. The force from a striking mechanism forces the sear and the linkage members into a collapsed configuration, releasing the striking mechanism and firing the firearm. This two toggle configuration of the trigger assembly provides crisp and reliable release of the firearm.

Abstract: Bullets, including lead-free bullets with frangible cores, are described herein. In some embodiments, a bullet includes a jacket having an inner surface defining a cavity having an open end and a closed end. The bullet also includes a lead-free core positioned within the cavity and extending from the closed end to a first intermediate portion of the cavity. The core includes a plurality of particles that are compacted within the cavity to form the core. The bullet also includes a seal positioned within the cavity and extending from the first intermediate portion to a second intermediate portion of the cavity. The seal abuts the inner surface of the jacket, thereby substantially sealing off the core within the cavity. The bullet may also include a polymeric tip having a forward portion projecting forward from the open end and a rearward portion extending rearward into the cavity.

Abstract: A bullet comprising a lead-free body having a tail section and a nose section. The nose section has an ogived outer surface and a forward terminus. The body further has an opening at the terminus, and a cavity in the nose section. The cavity extends rearward from the opening to an intermediate section of the body. The cavity includes a forward sidewall having at least a generally frusto-conical shape that converges rearward from the opening to a transition area. The cavity further includes a rear sidewall extending rearward from the transition area at a different angle than the forward sidewall.

Abstract: Bullets, including lead-free bullets with frangible cores, are described herein. In some embodiments, a bullet includes a jacket having an inner surface defining a cavity having an open end and a closed end. The bullet also includes a lead-free core positioned within the cavity and extending from the closed end to a first intermediate portion of the cavity. The core includes a plurality of particles that are compacted within the cavity to form the core. The bullet also includes a seal positioned within the cavity and extending from the first intermediate portion to a second intermediate portion of the cavity. The seal abuts the inner surface of the jacket, thereby substantially sealing off the core within the cavity. The bullet may also include a polymeric tip having a forward portion projecting forward from the open end and a rearward portion extending rearward into the cavity.

Abstract: A key actuated safety mechanism is described for mounting in the hand grip of a revolver or other hand gun. The safety mechanism includes a rotary operator having an eccentric projection which upon rotation to a locked portion directly engages the hand gun firing mechanism as a stop to prevent firing, or is coupled to such firing mechanism by a lock bar which acts as the stop. An improved key actuated rotary lock for use with such safety mechanism is also described having a cam actuated, spring biased plunger operated by the key inserted into an opening through such plunger for enabling the lock to be rotated between locked and unlocked positions.