The SR25 AEG from G&G Armament gets updated with the M-Lok handguard and G2 fFull metal gearbox that gas a high torque motor, quick spring change guide, 8mm bushings and bearings, and MOSFET that you program 3 or 5 round bursts plus a low battery indicator. Reapers Airsoft took time to give this a full scrutiny in this video... "Hello guys, in this video we take a closer look at the G&G SR25 / M110 E2 with M-LOK, G2H Gearbox."