Shop 4,464 Deals on Upper Receivers

Grid Defense Complete Upper Receiver 9mm 9x19 Para 16 inch 4150 Light HBAR Barrel 1-10 Twist 14 inch M-LOK Rail A2 Flash Hider Black

Grid Defense Complete Upper Receiver 7.62x39 16 inch Carbine Length 4150 Light HBAR Barrel 1-10 Twist 14 inch M-LOK Free Float Hand Guard A2 Flash

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

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

Bear Creek Arsenal BC-15 5.56 NATO 16in Bolt Action Style Upper Receiver M4 Barrel 1-9 Twist 1/2x28 Flash Hider Parkerized

Bear Creek Arsenal BC-15 6.5 Grendel 16in Bolt Action Style Upper Receiver M4 Barrel 1-8 Twist 5/8x24 Flash Hider Black Nitride

Rosco Manufacturing Purebred Stripped Upper Receiver AR-15 Forward Assist/Ejection Port Cover Black

Ghost Firearms Elite Complete Upper Receiver 5.56x45 NATO 10.5 inch Carbine Length 4150 M4 Barrel 1-7 Twist 9 inch M-LOK Free Float Hand Guard A2

Stag Arms AR-15 A3 Stripped Upper Receiver .223/5.56mm Type 3 Hard Coat Anodized Right Hand Black

Aero Precision M4E1 Threaded Complete Upper Receiver 5.56 11.5in Carbine Length 1-7 Twist 10.3in ATLAS R-ONE Handguard A2 Flash Hider Cerakote OD

American Defense Manufacturing 5.56 14.5 Inch Barrel M-Lok Rail Upper Reciever Black 14.5 in

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

Spikes Tactical Upper 5.56 14.5in 16in OAL CHF Midlength w/10in BAR2 Rail w/ Vortex

Optics Planet Exclusive Aero Precision Complete Upper Receiver M4E1-T 8in .300 Blackout BRL 7in M-LOK ATLAS S-ONE HG Anodized W/BCG/CH Black

Obsidian Arms OA-15C Billet Upper Receiver Black

CMMG DISSENT Upper Receiver Mk4 300BLK 6.5in 1-7 Twist 5/8x24 Thread Zeroed Linear Compensator Coyote Tan

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

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

ABC RIFLE COMPANY AR-15 .300 AAC Blackout Pistol 10in Quadrail Handguard Complete Upper Receiver w/BCG And Charging Handle Burnt Bronze

ABC RIFLE COMPANY AR-15 .300 AAC Blackout Pistol 10in Quadrail Handguard Complete Upper Receiver w/BCG And Charging Handle Flat Dark Earth

ABC RIFLE COMPANY AR-15 .223 Remington/5.56x45mm NATO Pistol 7in Barrel Custom 7in Top Cut Hybrid M-LOK Handguard Complete Upper Receiver w/BCG And

Troy 300AAC Caliber SOCC Rail Handguard A4 Upper Receiver Kit 12.5in w/Sights Black

UTG Pro AR15 Billet Upper Receiver Black

V Seven Sovereign AR-15 Threaded Stripped Upper Receiver w/no Forward Assist Cerakote Armor Black