Shop 4,464 Deals on Upper Receivers

CMMG Mk3 .308WIN Resolute Upper Group Receiver 16.1in Charcoal Green

CMMG Banshee Mk3 8.6 Blackout 12.5 inch Upper Receiver Coyote Tan

CMMG Dissent Mk3 6.5mm Creedmoor 20 inch Upper Receiver 1-8 Twist 5/8 x 24 CMMG ZEROED Muzzle Brake Cerakote/Hard Coat Anodized Sniper Grey

CMMG Dissent Mk3 6.5mm Creedmoor 20 inch Upper Receiver 1-8 Twist 5/8 x 24 CMMG ZEROED Muzzle Brake Cerakote/Hard Coat Anodized Charcoal Green

CMMG Upper Group Dissent 9Mm 16.1in Empire Profile Non-Threaded Charcoal Green

CMMG Upper Group Dissent 9Mm 16.1in Empire Profile Non-Threaded Sniper Grey

CMMG Dissent Mk3 6.5mm Creedmoor 20 inch Upper Receiver 1-8 Twist 5/8 x 24 CMMG ZEROED Muzzle Brake Cerakote/Hard Coat Anodized Titanium

CMMG Dissent Mk4 5.56mm 14.5in P&W Upper Group 1-7 Twist 1/2 X 28 TPI 23.6in .750in Titanium

CMMG Dissent Mk4 5.56mm 14.5in P&W Upper Group 1-7 Twist 1/2 X 28 TPI 23.6in .750in Midnight Bronze

CMMG Upper Receiver Assembly Mk3/.308WIN Coyote Tan Coyote Tan

CMMG Mk47 7.62X39mm Banshee Upper Group Receiver 8in Tungsten

CMMG Mk4 6mm ARC Resolute Upper Group Receiver 16.1in Tungsten

CMMG Mk4 4.6X30mm Banshee Upper Group Receiver 8in Coyote Tan

CMMG Mk4 4.6X30mm Banshee Upper Group Receiver 8in Charcoal Green

POF USA Minuteman Upper Receiver Assembly .350 Legend 34 in Length 10.5 in Barrel Mid Length Lo Pro DI Renegade Three-Prong Flash Hider 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 Flat Dark

Bear Creek Arsenal BC-10 .308 Winchester 16in Upper Receiver Heavy Mid-Length 1-10 5/8x24 Flash Hider Parkerized ODG

CMMG Upper Receiver Assembly Mk4/AR15 Forward Assist Sniper Grey

Grid Defense Complete Upper Receiver 9mm 9x19 Para 5.5 inch 4150 Light HBAR Barrel 1-10 Twist 7 inch Octagon M-LOK Rail Dimpled Flash Can OD Green

AT3 Tactical AR-15 Slick Side Billet Upper Receiver Burnt Bronze

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

Tiger Rock AR-15/47/9/300 Stripped Upper Receiver Cerakote OD Green Medium

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

Bear Creek Arsenal BC15 .458 SOCOM 16in Upper Receiver Heavy Carbine Length w/.936 1-14 5/8x32 Flash Hide Parkerized ODG