Semi Auto AEG, all metal. Runs on a 7.4v lipo, not included. Comes with high capacity magazine. I bought this used off of another person, who hadn’t shot it, when I chrono’d it it was only shooting 165 FPS, which is 1/3 what it should be shooting, and I don’t have the time or patience to diagnose and repair whatever the issue is. Might be something simple, but I have other guns to tool with, so I’m selling this one as is. Free shipping.