Geissele AR-15 Super Duty MOD1 Upper Receiver Assembly 5.56x45mm 14.5" Pinned and Welded HBAR Barrel M-LOK Black

Geissele 5.56 Super Duty MOD 1 Upper Reciever 14.5 in Black. Based on our Super Duty platform our Super HBAR Uppers feature a thicker HBAR profile with significantly thicker Super HBAR straight gas tube. Our Super HBAR Upper effortlessly handles higher volumes of fire without sacrificing match grade accuracy. Foundational to the renowned quality and performance of this system is the in-house produced Cold Hammer Forged chrome-lined Super Heavy Barrel and Nanoweapon-coated Reliability Enhanced Bolt Carrier Group. Both the Geissele CHF barrel and Forged Stressproof Bolt are High-Pressure Tested (HPT) and Magnetic Particle Inspected (MPI) and work in concert to achieve unmatched dependability with match-grade accuracy. Specifications for Geissele 5.56mm Super Duty MOD 1 Upper Reciever: Manufacturer: Geissele Caliber: 5.56mm Barrel Twist Rate: 1-7 Threads per Inch: 5/8x24 Gas Block Journal Size-Diameter: .812 in Package Contents: Geissele 5.56 Super Duty MOD 1 Upper Reciever Geissele 08-616B: 5.56 Super Duty MOD 1 Upper Reciever 14.5 in Black