Thread Protectors For GlockA(R) - 21 Thread Protector, .578''''-28
Thread Protectors For GlockA(R) - 21 Thread Protector, .578''''-28, Protects your threaded barrel when an accessory is not installed. Fits Lone Wolf threaded barrels and others with the specified thread pattern only. Will not fit factory GlockA(R) barrels. Mfg: Lone Wolf Dist. SPECS: 303 stainless steel, knurled, black oxide finish.