Shop 4,464 Deals on Upper Receivers

CMMG 9mm Banshee Fixed Ejector Upper Group Receiver 8in 1-10 Twist 1/2 X 28 TPI 16.5in Tungsten

Blackout Defense Dual Taper Lock Mid Complete Upper 16in Barel M-LOK Handguard Bronze

Blackout Defense Dual Taper Lock Mid Complete Upper 14.5in Barel M-LOK Handguard Green

Blackout Defense Dual Taper Lock Complete Interpose Uppers 11.5in Barrel M-LOK Handguard Grey 14459

Brigade Manufacturing AR Upper Receiver Forged Black

Brigade Manufacturing AR Complete Upper Receiver Forged 9mm 16 inch Barrel Black Mini Can 15 inch Rail No Charging Handle NO BCG

Jacob Grey Firearms Complete Upper Assembly 5.56 NATO 13in 1-7 Twist 1/2x28 Thread Black

Rock River Arms Upper Receiver EOP .223 Wylde 24 Inch Barrel Varmint Profile 1-12 Twist Free-Float Handguard Black

Rock River Arms Completed Upper Receiver Left Handed RAGE .223/5.56mm 10.5 Inch Barrel 1-9 Twist 1/2-28 Thread Free-Float Handguard A2 Flash Hider

Rock River Arms Completed Pistol Upper Receiver A4 .223/5.56mm 7 Inch Barrel 1-9 Twist 1/2-28 Thread Free-Float Handguard A2 Flash Hide Black

CMMG Upper Group Dissent Mk3 .308Win 16.1in Empire Profile Non-Threaded Charcoal Green

Bilson Arms 9mm Pump Style Forward Charging Upper Assembly with 416R-Stainless Steel Barrel Anodized 1

Matrix Arms Dual Charge Upper Receiver/Enhanced BCG Package 5.56x45mm NATO Hardcoat Anodized Black

LWRCI Complete Di Upper Receiver 5.56mm 16 inch Barrel 1-7 Twist Extended M-LOK Handguard Black 16in

Del-Ton Pre-Ban Heavy Profile Flat Top Barrel Assembly 5.56x45mm NATO 16 in Mid Length 1-9 Twist Chrome Lined Teflon Black

Aero Precision EPC-9 Threaded Complete Upper Receiver 11in 9mm w/ ATLAS S-ONE 10.3in Handguard FDE

Aero Precision Complete Upper Receiver M4E1-T 5.56x45mm NATO 16in Government Mid Length 1 in 7 1/2 x 28 12.7in A2 Flash Hider Cerakote FDE

Phase 5 Tactical A3 Flat Top Upper Receiver

Adams Arms FGAA01358 P1 Complete Piston Upper 5.56x45mm NATO 11.50 in Black Nitride Barrel, Aluminum Black Receiver, M4 Handguard for AR-Platform

VKTR Industries VK-1 5.56x45mm NATO 11.5 inch Upper Receiver Heavy Carbine Length 1-7 Twist Armor Black

VKTR Industries VK-1 5.56x45mm NATO 13.7 inch Upper Receiver Heavy Carbine Length 1-7 Twist No Muzzle Device Sniper Grey

CMMG MkGs .40 S&W Banshee Upper Group Receiver 8in Coyote Tan

CMMG Mk4 .350 Legend Resolute Upper Group Receiver 16.1in Charcoal Green

CMMG Mk4 .22LR Resolute Upper Group Receiver 17in Charcoal Green