For sale: Zombie Barrels .300 Blackout 16" Carbine Gas Length I bought this off a guy who said he ordered it new and never used it. I mounted it on my upper but never fired it. I decided to order one with a pistol length system so I'm gonna let this one go. There are some marks from the set screws where I mounted the gas block - see image. Zombie Barrels is defunct, but I have heard the barrels were made by citidel. Honestly, I don't know much about them. I paid $140 for it so I would love to get that much, but, I am willing to negotiate as I just want to get rid of it. Thanks!