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.
| FFL SOT Shipping Required | No |
|---|---|
| Made In America? | Yes |
| Platform | AR15 |
| Weight(s) | - |
| Other Features | - |
| Front Sight Removable | No |