Shop 4,464 Deals on Upper Receivers

CMMG Upper Group Dissent Mk3 .308Win 16.1in Empire Profile Non-Threaded Tungsten

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

CMMG Dissent Mk4 .300BLK 16.1in Empire Profile Upper Group Charcoal Green

Rock River Arms Completed Pistol Upper Receiver Mountain .223/5.56mm 10.5 Inch Barrel 1-9 Twist 1/2-28 Threat A2 Flash Hider Black

Radical Firearms 16in 450 MHR Complete Upper Receiver Group Black

CMMG Mk47 7.62X39mm Resolute Upper Group Receiver 16.1in Midnight Bronze

CMMG Mk4 .22LR Resolute Upper Group Receiver 17in Midnight Bronze

Spikes Tactical Upper 5.56 11.5in FN CHF w/10in SAR3 Rail

UnbrandedAR AR15 Rifle Build Kit 16in Barrel 12in Rail Black

Brenton USA Upper Receiver Scout .223 Remington 18in Barrel 1/2x28 Thread 1-8 Twist Midnight MarbleKote Midnight MarbleKote

Brenton USA Upper Receiver Tracker .22 Nosler 22in Barrel 1/2x28 Thread 1-8 Twist Snow MarbleKote Snow MarbleKote

Brenton USA Upper Receiver Tracker 6mm ARC 22in Barrel 5/8x24 Thread 1-7.5 Twist Foliage MarbleKote Foliage MarbleKote

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

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

Brenton USA Upper Receiver Tracker 6.5mm Grendel 22in Barrel 5/8x24 Thread 1-8 Twist Foliage MarbleKote Foliage MarbleKote

Brenton USA Upper Receiver Scout .300 Blackout 18in Barrel 5/8x24 Thread 1-8 Twist Autumn MarbleKote Autumn MarbleKote

Adams Arms P3 Upper Receiver AARS .224 Valkyrie 20in Government Contour Rifle Length 1-7 Twist 1/2-28 Thread MLOK Handguard Jet Comp Black

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

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

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

ABC RIFLE COMPANY AR-15 .300 AAC Blackout Micro Pistol 5in Barrel M-LOK Handguard Upper Receiver w/BCG And Charging Handle Olive Drab Green

ABC RIFLE COMPANY AR-15 .223 Remington/5.56x45mm NATO Pistol 10in Quadrail Handguard Complete Upper Receiver w/BCG And Charging Handle Olive Drab

ABC RIFLE COMPANY AR-15 .223 Remington/5.56x45mm NATO Pistol 10in Quadrail Handguard Complete Upper Receiver w/BCG And Charging Handle Bronze

ABC RIFLE COMPANY AR-15 .223 Remington/5.56x45mm NATO Micro Pistol 5in Barrel M-LOK Handguard Upper Receiver w/BCG And Charging Handle Burnt Bronze