Six-position 7075-T6 carbine receiver extension for mil-spec collapsible stocks.

The BCM Mil-Spec Carbine Receiver Extension is a six-position 7075-T6 tube for standard carbine buffers, carbine action springs, and mil-spec collapsible stocks.
Add the BCM Mil-Spec Carbine Receiver Extension to your build and see how it enhances your platform.