Abstract: An automatic projectile firing weapon and a related method for absorbing the recoil force of an automatic projectile firing weapon are disclosed. The weapon includes a barrel assembly that is slidably mounted in a receiver, biased by an operating spring, and engageable with a main sear. A gas operated bolt assembly is slidably mounted within the barrel assembly and is driven by a bolt spring. A trigger is provided to release the main sear and allow the operating spring to move the barrel assembly forwardly in the receiver. There is further provided a buffer connected between the receiver and the barrel assembly to dampen the velocity of the barrel assembly to ensure the barrel assembly is moving at a predetermined maximum velocity when a round is fired at a predetermined firing position. The recoil energy from the fired round is absorbed mainly by the forward motion of the barrel assembly and in part by the operating spring and buffer.

Abstract: A handling system for brass shell casings in an ammunition handling system. A shaft has a first sprocket and first hub and a non-circular gear mounted thereto, and because of the non-circular gear, rotates at a variable speed when driven by a power source. A second hub, coaxial with the shaft and rotatable independently of the shaft, has a second sprocket and a circular gear mounted thereto, and because of the circular gear, rotates at a selected speed when driven by the power source. The speed of the first sprocket varies between being equal to the speed of the second sprocket to being less than the speed of the second sprocket so that one end of a shell casing mounted on the two sprockets first lags behind the other end of the shell casing, then catches up to the other end of the shell casing.