upgraded m4. kac style rail. includes rail covers and grip. internals are 22tpa zci motor. 13:1 shs/rocket gears. Shs trigger contacts with nukefet. Wired to deans(I can do tamiya I’d needed) in the buffer tube. fps 360 on .2. S-hop modded (200ft effective confirmed ). 6.01 inner barrel. Rotary hopup. Shooting videos on request.