Shop 4,464 Deals on Upper Receivers

CMMG Banshee 200 Upper 9mm 8 Barrel with 30-Round Magazines

Radical Firearms Complete Upper Assembly 18in 223 Wylde 416R HBAR Contour 1/8 Twist 15in RPR M-LOK A2 Flash Hider Black

Radical Firearms Complete Upper Assembly AR-15 .300 Blackout 10.5in Barrel 9in HG M-LOK MHR 5/8x24 A2 FH Black

Radical Firearms RF Upper Assembly 16in 300 AAC HBAR Contour 1/8 Twist 15in RPR M-LOK A2 Flash Hider Black

Radical Firearms Upper Assembly 16 inch 300 AAC HBAR Contour 15 inch MHR w/o BCG and CH Black

Rock River Arms AR-15 Coyote Upper Receiver Assembly 223 Wylde 20" Chrome Moly Barrel 15" M-LOK Handguard Black

Arms Republic Stripped Billet Upper Receiver AR-15 Black

Rainier Arms RUC DI 5.56 NATO Complete Upper 16in Black Medium

New Frontier Pistol Caliber Billet AR-9/45 Slick Side Upper with LRBHO

Blackout Defense Complete Dual Taper Lock .223 Wylde Upper Receiver Group Forward Assist 13.9in Mid Grey

Radical Firearms RF Upper Assembly 8.5in 300 AAC HBAR Contour 1/7 Twist 7in MHR M-LOK A2 Flash Hider Black

Stag Arms AR-10 Long Range Right Hand Upper Receiver 308 Winchester 20in Barrel HBAR-CMV Profile 1-10 Twist 5/8X24 Thread VG6 Gamma Black

Blackout Defense Complete Dual Taper Lock .223 Wylde Upper Receiver Group Forward Assis 16in Mid Black

Blackout Defense Complete Dual Taper Lock .223 Wylde Upper Receiver Group Slick Side 14.5in Mid Grey

Aero Precision Complete Upper M4E1-T 5.56 8in Pistol Barrel SM7.3 Cerakote FDE

Aero Precision Complete Upper M4E1-E 5.56 8in Pistol Barrel EM7.3 Anodized Black

Next Level Armament NLX Elite 5.56x45mm NATO AR-15 Upper Receiver Stripped Forged Black

LBE Unlimited AR 556NATO 1/9 TWIST 7-inch M4 BBL

Kaw Valley Precision Carbon Fiber 9mm Complete Barrel Upper Receiver 16in Barrel 18in CF Handguard XL Linear Compensator Black Medium

Angstadt Arms AR-15 Complete Upper Assembly with Flash Hider 9mm Luger 16 inch Barrel M4 Profile 1-10 Twist 1/2x28 Chromoly Black

Radical Firearms Complete Upper Assembly 16in 223 Wylde 416R HBAR Contour 1/8 Twist 15in MHR M-LOK A2 Flash Hider Black

Radical Firearms Complete Upper Assembly 16 inch 300 AAC HBAR Contour 15 inch MHR A2 Flash Hider w/BCG and CH Black

Radical Firearms Complete Upper Assembly 8.5in 300 AAC HBAR Contour 1/7 Twist 7in MHR M-LOK A2 Flash Hider Black

Radical Firearms Complete Upper Assembly 16 inch 5.56 SOCOM mid 15 inch MHR A2 Flash Hider w/BCG and CH Black