Systems for firearms

摘要

Provided in one aspect is an annular gas ring within or adjacent a barrel to increase the efficient transfer of pressurized gas to one or more gas ports, which may communicate the high-pressure gas from near the chamber distally to a piston to cycle the action of the firearm. Provided in another aspect is a modular quick-disconnect barrel assembly for long-stroke gas-operated firearms such as the AK-47, which allows barrel and gas systems to be replaced together simply by pulling a single pin, thereby allowing the caliber of the firearm to be instantly changed to 12-gauge shotgun or any dimensionally smaller rifle or handgun round. A novel forward-charging handle system is also provided that works with the modular quick-disconnect barrel assembly.

主权项

1. A functional gas-operated modular firearm, comprising:
a receiver assembly comprising:
a long-stroke gas-operation system comprising a piston and longitudinally-extending operation rod mechanically attached with and adapted to move together with a bolt group through an operating cycle of firing, extracting, and ejecting a first round and chambering a second round;a trunnion having an opening adapted to removably receive and locate therein a chamber portion of a barrel assembly;a pin attached with the trunnion such that when in a first position the pin is adapted to lock the barrel assembly to the receiver assembly, and that when in a second position the pin is adapted to release the barrel assembly from the receiver assembly, whereinthe pin is adapted to pass through a hole in the trunnion and removably engage a groove in an outer surface of the chamber portion of the barrel assembly; and wherein the barrel assembly comprises:
the chamber portion adapted to removably engage with the trunnion and to house the first and second rounds for firing when removably engaged with the trunnion;a longitudinally extending barrel portion adapted to direct the first and second rounds after firing, and supporting thereon a gas cylinder;one or more gas communication ports adapted to communicate to the gas cylinder high-pressure gas from the firing of the first and second rounds;the gas cylinder adapted to at least partially surround the piston of the long-stroke gas-operation system when the chamber portion is removably engaged with the trunnion, and to transmit to the piston high-pressure gas from the firing of the first and second rounds that causes the long-stroke gas-operation system to move through the operating cycle; the barrel assembly removably attachable with the receiver assembly by movement of the pin; and
the barrel assembly constructed to be removable from and replaceable into the functional gas-operated modular firearm by said movement of said pin without having to remove or replace any other fasteners or parts.