We-tech mp7 (marketed as smg-8). It comes with the gun, 3 mags, and barrel extenders if you want them. So there’s something wrong with this gun or maybe it’s the mags I don’t know. Gbb is not my forte and I haven’t taken it apart. It shoots but it seems like theirs either something wrong with the gas seal or the hop up. I dunno. If you have any questions contact me, I can provide more pictures/ shooting vid upon request.