Armaspec Self Retention Castle Nut AR-15 OD Green

Same aluminum castle nut as the rest of the Armaspec line, finished in olive drab green. The locking thread design holds the nut tight against the end plate under recoil, so a builder can skip staking and skip thread locker while still trusting the stock not to work loose.

That matters most on a rifle that gets taken apart. Staked castle nuts are permanent by design; this one can come off with a wrench and go back on just as tight. Threads are standard AR-15 receiver extension, so it pairs with mil-spec buffer tubes and any common end plate, including QD plates. Backed by a lifetime warranty from Armaspec.