Sort by popularity Sort by latest Sort by price: low to high Sort by price: high to low View: 12 24 All Read more Add to WishlistAlready In Wishlist Add to Wishlist AR15/M16 PartsAR15 Receiver Extension Buffer Tube Lock Ring $0 The IMI Defense Receiver Extension Buffer Tube Lock Ring is a high quality component for the AR-15 or LR-308 Carbine, made to strict military specifications. Add to Wishlist