The LMT AR-15 castle nut is machined from steel with precisely cut threads and is designed to securely attach your receiver extension tube to the lower receiver and prevent it from backing off over time. This high-quality part is great for your next pieced together build and features a cutout for staking your endplate for a rock-solid build. Attaches with a standard castle nut wrench or spanner wrench. Compatible with AR-10 specific receiver extensions.
- Machined from steel
- Precise threads
- Compatible with AR-15 and AR-10 buffer tubes
Lewis Machine and Tool Company has been providing US Military, law enforcement, and government agencies with high-quality weapon systems since 1980. LMT is dedicated to providing that same level of precision engineering to civilians as well and is even expanding into foreign military services as well. All LMT Defense products are 100% made in America and they are a qualified 2005 GSA supplier. Lewis Machine & Tool has also won many awards for their quality engineering and excellence in business.