This is one of the coolest guns ive posted so far, started as a Rock river/specna m4. since i have added a standard buffer and stock, a Daniel Defense 10" rail system. the engine is a Backdraft innovations phoenix, which is a full/semi/binary HPA engine that is in beta works right now. beautiful little engine, WILL REQUIRE MAGS, FCU BATTERY, AND A TANK SETUP TO BE FIELDED. you can see the minor cosmetic issues like the missing trigger guard, but you can find them for low prices and however YOU want it to look. PRICE IS FEE'D text me to work on that.