The forearm of a pump shotgun is mounted for reciprocal movement with respect to the magazine tube through a coupling system which prevents twisting of the forearm. A coupling system includes grooves in the exterior sidewall of the magazine tube and detents on the exterior sidewall of the forearm mount tube in registration with the grooves.
A weapons barrel oscillation reduction apparatus includes a plurality of donut shaped rings or washers mounted on the muzzle end portion of a weapons barrel. The weapons barrel has breech and muzzles end portions and provides a machined ring carrying outer surface at the muzzle end portion. An annular shoulder at one end portion of the ring carrying portions acts as a stop for the plurality of rings mounted thereon. A retainer can be removably attached to the opposite end of the ring carrying surface. Upon assembly, the rings can move slightly in a longitudinal direction with respect to each other during a firing of a projectile from the weapons barrel, the weight of the rings and the slight movement of the rings function to reduce barrel oscillation.
