The Receiver Nut for collapsible receiver extension, also referred to as a Castle Nut. This mil-spec part with fit both the mil-spec and commercial receiver extensions.
Features:
- Steel construction
- Durable weather resistant finish
- Fits both commercial and Mil-spec buffer tubes
- It includes 1 x Castle Nut
Specifications:
- Material: Steel
- Color: Matte Black
Strike Industries AR Receiver Extension Castle Nut