AERO: Receiver Extension Lock Nut (Castle Nut)

Rose, Copper, Gold, Silver PVD Coated

For AR-15 & AR-10 

Mil-spec. receiver extension lock nut (castle nut) helps you to finish your custom AR build. Mil-spec dimensions plus our micro-thin Titanium Nitride coating ensure the highest level of durability and correct component fitment.

Mil-spec. receiver extension lock nut (castle nut) for use on AR15 carbines with an adjustable stock. Perfect for your new build or as a direct replacement for worn out parts.

Made in the USA.

Colors:

• SATIN ROSE | Matte TiCN
• SATIN COPPER | Matte ZrCN
• SATIN GOLD | Matte TiN
• POLISHED COPPER | Polished ZrCN
• POLISHED GOLD | Polished TiN
• POLISHED SILVER | Polished CrN

Includes:

• Receiver extension lock nut (castle nut)

Compatible With Models:

AR-15
AR-10