** The BCM Complete Lower pictured is California legal AS IS. Additional CA compliant parts or modification are the buyer's responsibility when built into a complete rifle. **
The BCM Lower Group w/MK2RMS-M1T0 & BCMGUNFIGHTER Stock Mod-1-SOPMOD (Compartment) - Black - utilizes the BCM MK2 Receiver Extension, MK2 buffer, and rifle M16 action spring. The MK2 receiver extension is approximately 3/4'' longer than the standard 6-position extension.
