stock kwa m4 2gx gearbox, shoots around 365 fps, needs a new 2gx bucking. it works great. installed a jag arms mlok system with Magpul foregrip. NC star red dot with killflash, back up iron sights and tan crane stock. included are 4 kwa mags, 5 MAG brand mags, 3 various metal mags, a 9.6 nunchuck battery and 3 rail segments. PayPal goods and services only.