Aero Precision Receiver Extension Lock Nut AR-15, LR-308 Matte

The Aero Precision Receiver Extension Lock Nut is an essential piece of your tough and accurate AR-15 carbine buffer assembly. This castle nut was made to meet military specs and fits on AR-15 carbines with adjustable stocks. Whether you're making a new build or replacing an old part, this Aero Precision lock nut has you covered. For use in AR-15 rifles with adjustable stocks Military-spec Can be used in new builds or as a replacement for worn-out parts