Got it from mystery box, I was thinking to make it an troll gun with string and sniper scope. (If you played battlefield 3 you know what I am warping about). Don’t have much time to work on it. Only issue I have with this is an strong spring that shots 450 FPS and the pamp sometimes doesn’t catch the piston. It will come rail segments, threaded adapter and 1 magazine. Original cost of this is $240, selling it for half.