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.
AR15/M16 Receiver Extension Lock Nut
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Never use a penny or anything else again to press your barrel! Sleeve and removable and adjustabl
