Geissele Automatics presents the Super Duty MOD1, a pinnacle of engineering excellence in the AR-15 platform. This complete upper receiver boasts a 12.5" Cold Hammer Forged Barrel and a Nanoweapon-coated Reliability Enhanced Bolt Carrier Group, ensur…

Introducing the Geissele Automatics GE SUPER DUTY MOD1 5.56 11.5 URG DDC, a marvel of engineering and design. This upper receiver group is crafted with precision, featuring a Cold Hammer Forged, chrome-lined barrel and a Nanoweapon-coated Reliability…

The Daniel Defense DD5 V5 Upper 6.5CM 20IN 1:8 15IN DD5 MLOK HG is a testament to superior engineering and design. This upper receiver is crafted for precision and durability, featuring a 20-inch barrel with a 1:8 twist rate and a 15-inch MLOK handgu…

Geissele Automatics presents the GE SUPER DUTY MOD1 5.56 10.3 URG DDC, a pinnacle of engineering excellence. This complete upper receiver is designed for the AR-15 platform, featuring a 10.3" Cold Hammer Forged barrel with a 1:7 twist, ensuring super…

Geissele Automatics presents the GE URG-I NC 556NATO 10.3" BLK/DDC, a masterpiece of engineering and design. Featuring a Geissele Super Modular Rail MK 16 handguard, hammer forged barrel, and carbine gas system, this upper receiver group enhances hit…

Geissele Automatics presents the MK16 14.5'' Super Duty Upper, a pinnacle of engineering and design quality. This complete upper receiver is chambered in 5.56mm and features a Nanoweapon coated Surefire Closed-Tine Flash Hider mounted to a 14.5"...

The Daniel Defense DD4 RIII Complete Upper Receiver 16" Barrel FDE is engineered with precision and quality, featuring a 16-inch Cold Hammer Forged Government Profile barrel and a mid-length gas system for smoother recoil. Ideal for shooting sports a…

The CMMG ENDEAVOR MK3 Upper Group 6.5 Creedmoor is engineered for precision and performance, featuring a 20-inch barrel that balances maneuverability with the accuracy expected from the ENDEAVOR line. Built on the LR-308/DPMS Gen 1 High-Pattern desig…

The CMMG DISSENT MK4 Upper Group 5.56 10.5 BLK is a marvel of engineering, featuring a patent-pending direct impingement Compact Action that houses the entire action and recoil assembly in the upper receiver. This design reduces bulk and length compa…

Aero Precision's EPC-9 9MM Assembled Upper is a testament to precision engineering and design excellence. Featuring a 16'' barrel and 15'' handguard, this upper receiver is crafted from anodized black aircraft aluminum, ensuring durability and...

Aero Precision's M4E1-T 6.5 Grendel Assembled Upper Receiver is a testament to precision engineering and design excellence. Featuring a 20-inch stainless steel barrel and a flat dark earth finish, this upper receiver is crafted for superior long-rang…

The CMMG Dissent MK4 300 Blackout is a marvel of modern firearm engineering, featuring a 6.50" barrel and Armor Black finish. Its innovative Compact Action and Radial Delayed Blowback technology ensure reduced bulk and length, making it a standout ch…