Buffer Kits

AR Buffer Kits and End Plate Hardware for Your Build

Buffer kits provide the receiver extension hardware needed to assemble and secure an AR-15 or AR-10 stock assembly. This category focuses on end plate kits, each pairing an end plate with a castle nut to lock the receiver extension in place. Choose from the Ambidextrous Dual Loop for left- or right-side sling routing, the Mil-Spec End Plate for common builds, or the Quick Detach Steel option with a QD provision for compatible sling mounts.

These American-made, mil-spec components support straightforward installation for first-time builders and experienced gunsmiths alike. Pair them with buffer parts like buffers and retainer springs, or complete the receiver with our lower kits.

Confirm the kit matches your receiver extension and intended sling setup before ordering. For broader assembly needs, see our build kits. White Label Armory also supports white-label manufacturing partnerships for firearms companies sourcing AR components.