It's a GHK MK18 Variant. A lot of work has gone into this build and if you're actually interested in buying it we can talk about it. Co2 mags/8Qty. Internal upgrades. External modifications. And no, do not offer me trades unless if it's something special. Selling it because I belong with a BAR. Pricing is negotiable. •Custom upper threaded to fit Mk18 rail. (Had to find a rethreading tool, done professionally by gun smith.) •Low flow nozzle installed/standard nozzle and 1J retained. •Enhanced recoil spring/buffer. •TNT Barrel/Hop combo installed. •Magpul pistol grip. •RS Daniel Defense Stock •Ambi Charging handle. •Green Laser PEQ/Flashlight.