Original it's a wretch open bolt, I bought it second hand. It works great and have no problems with it. I'm out of the ultra realism phase, so I want to get rid of it to start a build. It comes with 5 mags, the grey one is leaky, and I'll throw in the flashlight, angle grip, and silencer for extra money. Buyer pays shipping Upgrades Npas Silver both Avengers free float rail Angle customs inner barrel Magpul grip and stock