Gas-Piston

US12768608 - Firearm system with gas-piston system

A firearm system includes an upper receiver and a barrel mounted to the upper receiver and configured to fire projectiles. The firearm system further includes a bolt carrier arranged within the upper receiver for reciprocation during firing. The firearm system further includes a gas-piston system for transferring firing force to the bolt carrier for reloading after each projectile is discharged from the barrel.