Lower Receiver Group w/ MK2 Receiver Extension & Stock Mod 0 SOPMOD

BCM Lower Group w/MK2RMS-M1T0 & BCMGUNFIGHTER Stock Mod-0-SOPMOD (Wide-body) – Flat Dark Earth – 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.