Shop 4,464 Deals on Upper Receivers

USED Dark Hour Defense Billet Upper Receiver AR15 Black DHUPP EDEMO1 Used Condition Fair

USED Rock River Arms Completed Upper Receiver FESP .223 Wylde 16 Inch Barrel Mid Lenght Profile 1-8 Twist 1/2-28 Thread Free-Float Handguard Brake

KAK Complete AR15 Upper Receiver - 9mm - 16" Barrel - 13" MLOK

Complete AR15 Upper Receiver - 300 Blackout - 13.9" Barrel - 13" MLOK

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

Luth-AR 18 in Bull Barrel Complete Upper Barrel Receiver Assembly Silver/Black 18

Vltor Carbine Length Upper Receiver with Shell Deflector Only Black

Moriarti AR-15 5.56/.223 13.9in Carbine Upper Assembly w/ Pencil Profile Black 28.15in

USED Aero Precision M4E1 5.56 NATO No Forward Assist Threaded Assembled Upper Receiver Kodiak Brown

DEMO Aero Precision M4E1 Threaded Complete Upper Receiver 5.56 11.5in Carbine Length 1-7 Twist 10.3in ATLAS S-ONE Handguard A2 Flash Hider Cerakote OD

Luth-AR 18 in Bull Rifle kit minus Lower Receiver w/fixed stock M-Lok Black Rifle

Luth-AR Bull Rifle Kit Minus Lower Receiver w/ Collapsible Stock .223 27in 18in Bull Rifle 1x9 1/2x28 Picatinny KeyMod A2 Flash Hider Anodized

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

Blackout Defense Complete Dual Taper Lock .300 AAC Upper Receiver Group Forward Assist 9in Pistol Green

Blackout Defense Complete Dual Taper Lock .300 AAC Upper Receiver Group Slick Side 9in Pistol Grey

Bilson Arms Pump Style Forward Charging Upper Assembly 450BMFC-UA 16 inch 1-24 Twist Cerakote Sniper Green & Grey

Jacob Grey Firearms Ultralight Complete Upper Assembly 5.56 NATO 7.5in Black

Brigade Manufacturing AR Complete Upper Receiver Forged 5.56 16 inch Barrel FDE Charging Handle 15 inch Rail A2 Flash Hider

CMMG UPPER GRP RES MK4 5.56X45 NAT 16.1 TITAN B3B37FDB CMM

CMMG MkG .45 ACP Banshee Fixed Ejection Upper Group Receiver 5in 1-16 Twist 0.578x28 TPI .750in Tungsten

CMMG Upper Group Resolute Fixed Ejector MkG . 45 ACP 16.1in 1-16 Twist 0.578-28 TPI Tungsten

CMMG 9mm Banshee Fixed Ejector Upper Group Receiver 5in 1-10 Twist 1/2 X 28 TPI 13.7in Tungsten

CMMG 9mm Banshee Fixed Ejector Upper Group Receiver 5in 1-10 Twist 1/2 X 28 TPI 13.7in Sniper Grey

CMMG Upper Group Resolute Mk4 .22Lr 16.1in 1-16 Twist 1/2 X 28 TPI 24in Tungsten