Skip to Content
  1. All products
  2. Lower Parts
  3. AR15/M16/M4 RECEIVER EXTENSION CASTLE NUT
  4. Lower Parts
Pricelist: Dealer Pricelist
Pricelist: Dealer Pricelist
AR15/M16/M4 RECEIVER EXTENSION CASTLE NUT

AR15/M16/M4 RECEIVER EXTENSION CASTLE NUT

SKU: MIL-SPEC-CASTLE-NUT
UPC: 810033781322
AR15/M16 Receiver Extension Lock Nut 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.
$ 4.90 $ 4.90

Add to cart
Add to wishlist
Terms and Conditions
30-day money-back guarantee
Shipping: 2-3 Business Days

By entering this site you agree to our Privacy Policy. You must be 18 years or older to purchase firearms and related products.

Are you at least 18 years old?