Shop 4,464 Deals on Upper Receivers

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

CMMG DISSENT Upper Receiver Mk4 300BLK 10.5in 1-7 Twist 5/8x24 Thread Zeroed Linear Compensator Titanium

CMMG Mk47 7.62X39mm Banshee Upper Group Receiver 8in Sniper Grey

CMMG Mk47 7.62X39mm Banshee Upper Group Receiver 8in Midnight Bronze

CMMG Mk4 5.56x45mm NATO Endeavor Upper Group Receiver 18in Coyote Tan

CMMG Mk4 5.56X45mm NATO Resolute Upper Group Receiver 16.1in Titanium

CMMG Mk4 4.6X30mm Banshee Upper Group Receiver 8in Sniper Grey

CMMG Mkg Banshee Upper Receiver Group .45 ACP 8in Armor Black

CMMG Mk3 .308WIN Endeavor Upper Group Receiver 24in Titanium

Alexander Arms AR15 Stripped Rifle Upper 6.5 Grendel 20 in Barrel Carbine Length 1-9 Twist 5/8x24 Thread Black

CMMG DISSENT 9mm 16.1in Upper Receiver 1-10 Twist 1/2 X 28 TPI 25.5in Midnight Bronze

CMMG Upper Receiver Assembly Mk3/.308WIN Tungsten Tungsten

CMMG Mk4 5.56X45mm NATO Banshee Upper Group Receiver 10.5in 1-7 Twist 1/2 X 28 TPI 18.8in Midnight Bronze

CMMG Mk4 5.56X45mm NATO Resolute Upper Group Receiver 16.1in Charcoal Green

CMMG Mk3 .308WIN Endeavor Upper Group Receiver 24in Charcoal Green

Alexander Arms AR15 Stripped Pistol Upper 6.5 Grendel 11 in Barrel Carbine Length 1-7.5 Twist 5/8x24 Thread Black

CMMG Upper Group Dissent Mk3 6.5 Creedmoor 20in Empire Profile Non-Threaded Charcoal Green

CMMG Banshee Mk3 8.6 Blackout 12.5 inch Upper Receiver Midnight Bronze

CMMG Banshee Mk3 8.6 Blackout 12.5 inch Upper Receiver Charcoal Green

CMMG Dissent Mk3 8.6 Blackout 12.5 inch Upper Receiver 1-3 Twist 5/8 x 24 CMMG ZEROED Linear Compensator Cerakote/Hard Coat Anodized Armor Black

CMMG Banshee Mk3 8.6 Blackout 12.5 inch Upper Receiver Titanium

CMMG Upper Group Dissent Mk3 6.5 Creedmoor 20in Empire Profile Non-Threaded Midnight Bronze

CMMG Upper Group Dissent 9Mm 16.1in Empire Profile Non-Threaded Coyote Tan

CMMG DISSENT 9mm 16.1in Upper Receiver 1-10 Twist 1/2 X 28 TPI 25.5in Sniper Grey