Swamp Yankee Arms S.O.U.R

The Swamp Yankee Arms LLC S.O.U.R is the Suppressor Optimized Upper Receiver. It features a BCM handguard and our Swamp Yankee Arms Oppssum barrel. It is 5.56/223 chambered 14.625" barrel with 1/2x28 threading and a 1/7 twist. It features a nitride finish, a dimple for the gas block, and a rifle length gas system. The Opossum barrel is intended and designed to be run with traditionally baffled suppressors and has comparable gas blowback of an unsuppressed firearm with virtually no dwell time and designed to be as soft shooting as a 20" HBAR. With the intent to be suppressed, this barrel basically won't function without a suppressor so we 0/10 don't recommend using it without a suppressor. It also features a modified straight barrel profile and increased rigidity while reducing overall weight. The accuracy of the Opossum is sub MOA guaranteed with match grad ammunition. We are so psyched to present this upper receiver to you. When we thought it up, it was really just a drunken brainchild from a bunch of us at Swamp Yankee Arms so we hope you love it as much as we do.