A&K M16A4. I used it at one game. I love it but I named it "The guy behind the guy" because I would have to kill like 8 guns before I used it. I wired it to deans and removed the fuse. I'll throw in a lipo wired to deans as well that fits in the stock. Last time I chrono'd it it was shooting 425 fps with .25 gr BBs which is WAY too hot. If you want I can downgrade the spring to make it fieldable. I love the gun and I'd hate to see it go, but I've had it for over a year and only used it for one game. Its not worth letting it collect dust.
I'd say $150.