Looking to sell or trade this brand new (never shot or even chambered) 10.5" AR barrel. It's chambered for 300AAC (Blackout). It's a little unusual in that it's gas port is carbine-length instead of the typical pistol-length making it less prone to "over-gassing". I built the gun, but decided to go a different direction. So, if you're interested in it, contact me. I'd be willing to discuss price for a sale or trade for something preferably chambered in either 9mm or 5.56/223.