The Heat-Treated Castle Nut screws onto the AR15/M4 lower receiver extension (buffer tube) and keeps the receiver extension and lower receiver end plate secured in place.
Made in the USA.
| Product Specs | |
| Color | Black |
Brownells
Serious About Firearms Since 1939™, Brownells is the world’s leading source for gun parts and accessories, ammunition, gunsmithing tools, survival gear and archery products. The family-owned company proudly serves gunsmiths, gun owners, law enforcement and military organizations from its Montezuma, Iowa-based headquarters. Brownells is currently one of the largest supplier of firearms accessories and gunsmithing tools in the world.
