Complete Upper Receivers

Rock River Arms complete Tactical Carbine upper is an A4 upper chambered in .458 SOCOM with a 16" chrome moly bull barrel and 1:14 twist. Additionally the upper comes with a complete bolt carrier group, charging handle assembly, 15" RRA lightweight M-Lok...

Rock River Arms A4 Coyote Carbine upper comes chambered in .300 AAC / Blackout with a 16" chrome moly 1/8twist barrel. Additionally this upper includes a RRA 12.5" M-Lok compatible lightweight free float rail and a Smith Vortex flash hider (5/8-24...

The RISE 6mm ARC AR-15 Upper Receivers features an exceptionally accurate 18-inch 416R stainless steel threaded barrel.MANUFACTURER: Rise ArmamentMPN: RA-6ARC-CU-BRN-18MODEL: 0Type of Barrel: 01:07:00Barrel Length: 18"Description: M-LOKFinish:...

The RISE 6mm ARC AR-15 Upper Receivers features an exceptionally accurate 18-inch 416R stainless steel threaded barrel.MANUFACTURER: Rise ArmamentMPN: RA-6ARC-CU-BLK-18MODEL: 0Type of Barrel: 01:07:00Barrel Length: 18"Description: M-LOKFinish:...

The RISE 22 ARC AR-15 Upper Receivers features an exceptionally accurate 18-inch 416R stainless steel threaded barrel.MANUFACTURER: Rise ArmamentMPN: RA-22ARC-CU-BLK-18MODEL: 0Type of Barrel: 01:07:00Barrel Length: 18"Description: M-LOKFinish:...

The MK1 MOD 1-M line, revamped for 2018, features the PWS long stroke piston system. Internally, this line offers the tried and true system that PWS owners have grown to know and love. Featuring a free-float MLOK handguard, forward assist controls, and a...

Nordic Components' 22RB dedicated 22 upper receiver converts your standard AR-pattern lower to a dedicated .22LR for recreational shooting, training, and hunting. The 22RB is manufactured using the same materials as most standard AR15 rifles, ensuring...

The LA-SF15 RECON URG (Upper Receiver Group) is built to the highest quality standards and assembled by a skilled team of armorers. Each URG undergoes a shot test at Lantac's facility and includes a lifetime warranty against defects. The LA-SF15 URG...

The FX5500-U features Faxon's 14.5" Pencil Barrel with Integral Slim 3-Port Muzzle Brake which meets the NFA 16" minimum barrel length requirement, 13" Streamline Carbon Fiber Handguard, and Lightweight Bolt Carrier Group. Super light, easy shooting and...

Meet CMMG's newest long-range offering. Chambered in Hornady's new 6mm ARC (Advanced Rifle Cartridge), the CMMG's RESOLUTE upper receiver group allows you to pair this exciting caliber with your existing AR15 lower for superior function and accuracy at...

CMMG's RESOLUTE lineup is engineered with purpose for those who refuse to compromise on quality. Each RESOLUTE rifle comes with a 16-inch barrel and is designed for balance, accuracy and maneuverability. Whether you're defending your family or looking to...

The WORKHORSE complete upper receiver is purpose-built around the forged WORKHORSE 7075-T6 aircraft-grade aluminum receiver and free-float rail handguard with M-LOK attachment point at 3, 6, and 9 o'clock positions. At 12 o'clock is a full-length...