WASR-10 rifle without a bump stock fitted Bump stocks or bump fireplace stocks are gun stocks that may be used to help in bump firing, the act of utilizing the recoil of the semi-automatic firearm to fireside cartridges in quick succession. , Furthermore, every time a federal law is ambiguous, https://machguns.com/product/lot-1496-rock-island-armory-m60-machine-gun-class-iii-nfa/