Shop 4,464 Deals on Upper Receivers

Bear Creek Arsenal BC-15 .300AAC 16in Upper Receiver Heavy Pistol 1-8 1/2x28 Flash Hider Parkerized ODG

ABC RIFLE COMPANY AR-15 Billet Stripped Upper Receiver Cerakote Bronze

CMMG MkG .45 ACP Banshee Upper Group Receiver 5in 1-16 Twist 0.578 X 28 TPI 13.7in Charcoal Green

ABC RIFLE COMPANY AR-15 .300 AAC Blackout Micro Pistol Build 5in Barrel 4in M-LOK Handguard Upper Receiver Black

CMMG DISSENT Mk4 5.56x45mm NATO 6.5in Upper Receiver 1-7 Twist .750in 1/2 X 28 TPI Midnight Bronze

CMMG Mk4 9mm Resolute Upper Group Receiver 16.1in Midnight Bronze

Stag Arms AR-10 Tactical Right Hand Upper Receiver 308 Win 16in Barrel TAC-GOV-CMV Profile 1-10 Twist 5/8X24 Thread VG6 Gamma FDE

POF USA Revolution DI Complete Upper Cerakote Burnt Bronze 308WIN 16.5"

Radical Firearms Upper Assembly 16 inch 5.56 SOCOM mid 15 inch FCR A2 FH w/o BCG and CH Black

CMMG Mk4 6.5 Grendel Resolute Upper Group Receiver 16.1in Charcoal Green

Bear Creek Arsenal BC-15 .223 Wylde 20in Bolt Action Style Upper Receiver Government 1-8 5/16x24 Flash Hider Black Nitride Black

Grid Defense Complete Upper Receiver .300 Blackout 16 inch Pistol Length 4150 Light HBAR Barrel 1-8 Twist 14 inch M-LOK Rail A2 Flash Hider Tactical

ABC RIFLE COMPANY AR-15 7.62x39mm Micro Pistol Build 5in Barrel 4in M-LOK Handguard Upper Receiver Tungsten

Grid Defense Complete Upper Receiver .300 Blackout 7.5 inch Pistol Length 4150 Light HBAR Barrel 1-8 Twist 9 inch Octagon M-LOK Hand Guard Dimpled

Bear Creek Arsenal BC-15 6mm ARC 18in Upper Receiver Heavy Mid-Length 1-8 5/8x24 Flash Hider Parkerized Tungsten

Bear Creek Arsenal BC-15 .223 Wylde 16in Bolt Action Style Upper Receiver M4 Barrel 1-7 Twist 1/2x28 Flash Hider Parkerized

Radical Firearms Upper Assembly 16 inch 300 AAC HBAR Contour 15 inch FCR A2 FH w/o BCG and CH Black

Bear Creek Arsenal BC-15 5.56 NATO 16in Upper Receiver M4 Barrel Mid-Length 1-7 Twist 1/2x28 Flash Hider Parkerized

Grid Defense Complete Upper Receiver 7.62x39 10.5 inch Carbine Length 4150 Steel Light HBAR Barrel 1-10 Twist A2 Flash Hider Tactical Grape

Spikes Tactical Upper 5.56 14.5in 16in OAL CHF Midlength w/12in BAR2 Rail w/ Dynacomp

CMMG DISSENT Mk4 5.56x45mm NATO 10.5in Upper Receiver 1-7 Twist .750in 1/2 X 28 TPI Midnight Bronze

CMMG Mk4 6.5 Grendel Resolute Upper Group Receiver 16.1in Titanium

CMMG 5.7X28mm Banshee Upper Group Receiver 5in 1-9 Twist 1/2 X 28 TPI 13.8in Coyote Tan

CMMG MkG .45 ACP Resolute Upper Group Receiver 16.1in Tungsten