Geissele AR-15 Super Duty Upper Receiver Assembly 5.56x45mm 16″ Cold Hammer Forged Barrel M-LOK
The Geissele Super Duty AR-15 Upper Receiver Assembly features the latest in weapon technology available exclusively from Geissele Automatics. This 16” complete upper chambered in 5.56mm features a Nanoweapon coated Surefire Closed-Tine Flash Hider mounted to a 16” durable black oxid