Has a diablo Rail system but you can tell needs a smaller inner barrel as with the diablo rails it sticks out. I had a local shop do a little to the gear box and I had them put some metal nozzle in. It's a pretty cool little gun. Buyer pays shipping only thing not included in pictures is the sight. Will trade for m4 mags and deans batteries with charger, I'll just knock down price unless offered Enough to take off