Base gun is a elite umerex hk ump 45. It’s in pretty good condition. I dremeled a small hole out the back for wiring purposes. (it’s small and un-noticable) I’m including the parts to convert it back to an m4 build if you ever wanted that option. Comes with everything seen pictures. 3 mags Version 2 gearbox shell Version 2 trigger board with wiring harness M4 nozzle Rail pieces that screw into gun. One of the mags has some small cosmetic damage, as seen in the pictures. But it does indeed work. If you have any questions, let me know! Feel free to hit me up with offers. I chrono’d it and i’m getting 345 FPS (+- 5) using. 28g bbs and 120 psi. So this thing runs super well for it’s short barrel! The item “H&K Airsoft UMP 45 with Wolverine smp gen 2″ is in sale since Wednesday, January 24, 2018. This item is in the category “Sporting Goods\Outdoor Sports\Airsoft\Guns\Electric\Rifle”. The seller is “joshucreec-0″ and is located in Mount Olive, NC. This item can be shipped to United States.