Description
The Sierra K Receiver Extension Kit is the proprietary mounting system for the Sierra K Buttstock. It consists of a reduced-length, mil-spec diameter, 7075 aluminum, 5-position receiver extension, a short heavy buffer (3.5 oz), extra power spring, castle nut, and quick disconnect end plate.
- Color : Black
- Manufacturer Part : SRK-1660
- Model : Extension Kit
- Model : Sierra K
- Subcategory : Stocks & Buffer Tubes
