Frank Proctor, owner and lead instructor at Way of the Gun, asked Windham Weaponry to build a carbine to his specifications, and this is the Upper Receiver / Barrel Assembly from that specialized 3-Gun Competition carbine. A BCM MOD1 Compensator controls barrel rise on the superbly accurate 16” Medium Profile, Chrome Lined, 4150 Chrome Moly Vanadium 11595E Steel Barrel. It has M4 Feed Ramps, and is button rifled 1 x 7” R.H.T. A mid-length gas system functions under the Midwest Industries 15” Free-Float SS Key MOD Forend – ready for accessory sights on its full length Mil Std 1913 Rail. The complete WW forged upper includes a Bolt Carrier Assembly with Carpenter 158 Steel Bolt.