Shop 4,464 Deals on Upper Receivers

Rock River Arms BT-3 Completed Upper Receiver 6.5mm Creedmoor 28in 20in Barrel Standard SS Fluted Profile 1-10 Twist 5/8x24 Thread M-LOK Handguard

Rock River Arms Upper Receiver EOP .223 Wylde 16 Inch Barrel Varmint Profile 1-8 Twist Free-Float Handguard Black

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

Outerwild AR9 9mm Billet PCC Upper Receiver Black Anodize

Blackout Defense Complete Dual Taper Lock .300 AAC Upper Receiver Group Forward Assist 14.5in Pistol Grey

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

UnbrandedAR 15in Forged Upper Receiver Group Assembly AR15 7075-T6 Black Anodize .223 Wylde. 16in Barrel Government Profile mid Gas 4150 Black Nitride

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

Tiger Rock Complete Upper Receiver AR 9mm 16in Length 1-10 Twist w/ 15in Super Slim Keymod Handguard Black Large

Tiger Rock Complete Upper Receiver AR-15 5.56 NATO 16in Carbine Length 1-8 Twist w/10in M-LOK Handguard Black Large

Tiger Rock Complete Upper Receiver AR 7.62X39 10.5in Carbine Length 1-9.5in Twist w/ 10in M-LOK Handguard Black Large

Noveske 14.5in Gen III Afghan Upper Receiver 5.56 Nsr-13.5 M-Lok Stainless Steel Dead Air FH 0

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

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

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

CMMG Upper Group Resolute Fixed Ejector 9mm 16.1in 1-10 Twist 1/2 X 28 TPI 25.3in Midnight Bronze

CMMG Dissent Mk4 .350 Legend 16.1in Empire Profile Upper Group Titanium

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

Luth-AR 18 in Mark 12 kit minus Lower Receiver w/coll. Stock Black Carbine

Luth-AR 20 in Bull Rifle kit minus Lower Receiver w/coll. Stock M-Lok Black Carbine

CMMG Upper Group Dissent Mk47 7.62X39 16.1in 1-10 Twist 5/8 X 24 TPI .750in 26in Midnight Bronze

CMMG Upper Group Dissent Mk47 7.62X39 14.5in P&W 1-10 Twist 5/8 X 24 TPI .750in 27.5in Midnight Bronze

CMMG DISSENT Mk4 300BLK 14.5in P&W Upper Receiver 1-7 Twist 5/8 X 24 TPI .750in 23.6in Armor Black

Radical Firearms Complete Upper Assembly 16in .450 Bushmaster 15in MHR Black