Gunner Airsoft is now offering the Jing Gong M4 SR-16. This is... "100% copy of TM M4 SR-16, pre-upgraded 350 fps power, very smooth 300rd hi cap magazine. completely compatible with TM and CA parts. Weighs 5 kilos with metal gearbox, adjustable hop-up, and comes with the the usual high capacity magazine, battery and charger." We're somewhat skeptical with the 350fps claims, as new JG AEGs coming into the market are clocking up 420fps and more.