G&G CM16 GMS SBR GTP9 -Install replacement or upgraded parts

-Install replacement or upgraded parts as necessary or requested

Does not come with low mount

The original BCM MK2 Upper Receiver is redesigned by lessons learned in war on terrorism

Features the new Heavy Duty Belt Buckle V1

-          Base cap at the bottom of the grip allows internal grip access for general storage (GBBR version only)

G&G CM16 GMS SBR GTP9 -Install replacement or upgraded partsFeatures Reinforced polymer billet style receiver Polymer Picatinny handguard with Picatinny slots on the 3, 6, and 9 o'clock positions to mount your light, laser and other accessories Equipped with a MOSFET Integrated Gearbox providing better performance and durability while allowing more modularity True Quick Change Spring system allows you for easy, quick and efficient spring swapping Comes pre installed with a GATE ASTER SE programmable MOSFET