Shop 4,464 Deals on Upper Receivers

CMMG MkGs .40S&W Resolute Upper Group Receiver 16.1in Coyote Tan

CMMG Mk4 .300BLK Banshee Upper Group Receiver 8in 1-7 Twist 5/8 X 24 TPI 16.5in Titanium

CMMG Mk4 .22LR Resolute Upper Group Receiver 17in Tungsten

CMMG Mk10 10mm Banshee Upper Group Receiver 8in Coyote Tan

CMMG DISSENT Mk4 300BLK 16.1in Upper Receiver 1-7 Twist 25.5in 5/8x24 TPI .750in Midnight Bronze

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

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

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

CMMG Upper Group Dissent Mk47 7.62X39 16.1in Empire Profile Non-Threaded Tungsten

Stag Arms AR-10 Marksman Left Hand Upper Receiver 6.5 Creedmore 22in Barrel BULL Profile 1-10 Twist 5/8X24 Thread VG6 Gamma Black

Stag Arms AR-10 Long Range Right Hand Upper Receiver 6.5 Creedmore 24in Barrel HBAR-CMV Profile 1-10 Twist 5/8X24 Thread VG6 Gamma FDE

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

Brenton USA Upper Receiver Scout 6.5mm Grendel 18in Barrel 5/8x24 Thread 1-8 Twist Autumn MarbleKote Autumn MarbleKote

Brenton USA Upper Receiver Scout .350 Legend 18in Barrel 9/16x24 Thread 1-16 Twist Foliage MarbleKote Foliage MarbleKote

Brenton USA Upper Receiver Tracker .450 Bushmaster 22in Barrel 11/16x24 Thread 1-24 Twist Harvest MarbleKote Foliage MarbleKote

ABC RIFLE COMPANY AR-15 Custom Billet Modular Stripped Upper Receiver Burnt Bronze

ABC RIFLE COMPANY AR-15 Micro Pistol Build 5.56x45mm NATO 5in Barrel 4in M-LOK Handguard Upper Receiver Black

ABC RIFLE COMPANY AR .40 S&W Billet Pistol 4in Barrel Custom M-LOK Handguard Complete Upper Receiver w/BCG And Charging Handle Tungsten

ABC RIFLE COMPANY AR .40 S&W Billet Pistol 4in Barrel Custom M-LOK Handguard Complete Upper Receiver w/BCG And Charging Handle Flat Dark Earth

ABC RIFLE COMPANY AR-15 .300 AAC Blackout Micro Pistol 5in Barrel Custom 5in Top Cut Custom M-LOK Handguard Complete Upper Receiver w/BCG And Charging

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

Next Level Armament AR-10 .308 Caliber Upper Receiver Right Hand Black

Lead & Steel 5.56mm Billet Upper Receiver Black

Black Rain Ordnance Complete Upper Competition 3G 16in Black