A true Mil-Spec Receiver Extension tube for use on M4, AR-15 Carbines, AR-15 SBR's, and AR308 Carbines. Works with all Mil-Spec-sized AR carbine stocks.
Features:
- 6 stock positions
- Made from T6 7075 Aluminum
- Dry Film Lubed Interior
- Mil-Spec Dimensions
- Mil-Spec Anodized
MADE IN USA
