Shop 4,464 Deals on Upper Receivers

Blackout Defense Complete Dual Taper Lock .223 Wylde Upper Receiver Group Slick Side 12.5in Interpose Black

USED Next Level Armament Ascend Phoenix Billet AR15 Upper Receiver Black ASC100

Guntec USA AR-15 Complete 9mm Upper Receiver Mil-Spec Charging Handle 7 inch M-Lok Handguard 5.5 inch Contour 4150 Barrel 1-10 Twist 1/2x36 Slim Line

Brigade Manufacturing AR Complete Upper Receiver Forged 5.56 10.5 inch Barrel Tungsten Charging Handle 10 inch Rail A2 Flash Hider

Brenton USA Upper Receiver Tracker .224 Valkyrie 22in Barrel 1/2x28 Thread 1-7 Twist Snow MarbleKote Snow MarbleKote

Brenton USA Upper Receiver Tracker 6.5mm Grendel 22in Barrel 5/8x24 Thread 1-8 Twist Autumn MarbleKote Autumn MarbleKote

Brenton USA Upper Receiver Tracker .350 Legend 22in Barrel 9/16x24 Thread 1-16 Twist Autumn MarbleKote Autumn MarbleKote

EDEMO IMG 13 Gauge Upper Receiver For AR-10 .308 Lower Receivers w/ Two 5 Round Magazines Black EDEMO1

Aero Precision AR15 Stripped Upper Receiver No Forward Assist Uncoated

CMMG MkG .45 ACP Banshee Fixed Ejection Upper Group Receiver 8in 1-16 Twist 0.578x28 TPI .750in Sniper Grey

CMMG Banshee 200 Upper .22 LR 9 Barrel 25-Round Magazines

CMMG MkG .45 ACP Banshee Fixed Ejection Upper Group Receiver 8in 1-16 Twist 0.578x28 TPI .750in Charcoal Green

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

CMMG Dissent Mk4 .300BLK 16.1in Empire Profile Upper Group Titanium

CMMG Dissent Mk4 .300BLK 16.1in Empire Profile Upper Group Coyote Tan

Luth-AR 16 in Light Weight kit minus Lower Receiver w/fixed stock M-Lok Black Rifle

Luth-AR Mark 12 Kit Minus Lower Receiver w/ Collapsible Stock 5.56mm 27in 18in Government Rifle 1x9 1/2x28 Picatinny Key MOD A2 Flash Hider Anodized

Luth-AR Bull Rifle Kit Minus Lower Receiver w/Fixed Stock .223 31in 24in Bull Rifle 1x9 1/2x28 Picatinny Key MOD A2 Flash Hider Anodized Manganese

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

DoubleStar Complete Upper Receiver Standard Flattop with M4 Feed Ramps Black

Blackout Defense Dual Taper Lock Complete Interpose Uppers 11.5in Barrel M-LOK Handguard Green 14460

Blackout Defense Complete Dual Taper Lock .223 Wylde Upper Receiver Group Forward Assist 14.5in Mid Green

CMMG Dissent Mk4 5.56mm 16.1in Upper Group 1-7 Twist 1/2 X 28 TPI .750in 25.5in Sniper Grey

CMMG Dissent Mk4 5.56mm 16.1in Upper Group 1-7 Twist 1/2 X 28 TPI .750in 25.5in Charcoal Green