A fastening assembly, method of use and associate kit for use in firearms assembly is provided. In one embodiment, at least one insert having at least a first mating portion and slanted surface is provided. A second mating portion is provided and is adjacent at least one of a receiver or barrel and configured to interlock and mate with the at least first mating portion. A stock is also provided, having at least one sidewall and at least one seating portion provided adjacent or integrated with the one sidewall and dimensioned to correspond and accept at least a portion of the insert. In particular embodiments, a fastener is also provided to fasten and secure the at least one insert to the at least one seating portion of the stock.