We offer 2 versions of the Mark 2, the Polecat and the Commando.
Due to extended ship times, lead times for your order may vary depending on products ordered. We will email you if your items require an extended ship time. These are custom and hand built so thanks for understanding!
Chambered in .300 blk with a bloodline 8.2-inch Rosco Manufacturing heavy black nitride barrel with a 1:7 twist and a pistol-length gas system. This is the perfect choice if you own a can and want to go from sub to super with a mag change. We do not offer an adjustable gas block for the polecat because these are tailored to run subsonic and supersonic. This 300 BLK is tailored to run heavy subsonic bullets with the 1:7 twist.
Chambered in .300 blk with a bloodline 16-inch Rosco Manufacturing heavy black nitride barrel with a 1:8 twist and a pistol-length gas system. This works on a normal carbine AR-15 lower. A great choice for hunting with your AR-15. It is light recoiling and cycles regular hunting ammunition well. We do not offer an adjustable gas block for the Commando because these are tailored to run subsonic and supersonic. We only suggest using this upper on a carbine style lower receiver.
