I have here an Echo1 mp5. It features a SHS CYLINDER HEAD AND NOZZLE, CYMA METAL RACK PISTON, GATE HARD MOSFET. Shimmed and AOE corrected. Wired to deans. Comes with the gun, HARD programming button and single lead wire, 10 mid cap mags that don’t fit the best in the mag well so you’re getting those for free basically. They do work and feed bbs. M4 to mp5 mag adapter. Why you might ask and I really have no idea I just don’t want it anymore. the mp5 is solid and shoots around 330-350 haven’t chronod it for awhile. Shoots super straight. I just polished the barrel. Hit me up with any offers worst I’ll say is no