The Geissele Super Duty 14.5" Heavy Barrel (.750 Journal) DDC Stripped Upper Receiver is a premium AR-15 upper foundation built around a rugged cold hammer forged, chrome-lined 14.5-inch barrel with a .750? gas journal and 1:7 twist for reliable performance across a wide range of 5.56 NATO ammunition. Featuring a mid-length gas system with a Super Compact gas block, this stripped upper arrives without charging handle, BCG, muzzle device, or handguard — giving you the flexibility to finish the build with your preferred components. With a Distressed Diamond Cut finish and Picatinny rail on the receiver for optics and accessories, the 08-661S is ideal for custom precision, duty, or hard-use AR builds when matched with a compatible lower receiver and supporting parts. Geissele Super Duty 5.56mm 14.5" Heavy Bbl (.750 Journal) DDC Stripped Upper Receiver (No Charging Handle, Muzzle Device, or BCG) 08-661S