Shop 4,464 Deals on Upper Receivers

Spikes Tactical Upper 300BLK 16in w/10in SAR3 Rail

Bilson Arms 9mm FC PCC-UA Pump Style Forward Charging Upper Assembly with 4140 Nitride Coated Chrome Moly Steel Barrel Anodized Black

DoubleStar Complete Upper Receiver .224 Valkyrie 18 inch Barrel Heavy Profile 15 inch Cloak M-LOK Handguard A2 Flash Hider Black

CMMG Upper Group Resolute Fixed Ejector MkG . 45 ACP 16.1in 1-16 Twist 0.578-28 TPI Titanium

CMMG Dissent Mk4 .300BLK 16.1in Empire Profile Upper Group Hard Coat Anodized

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

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

Aero Precision Complete Upper Receiver M4E1-T .223 16in Wylde Barrel 12in M-LOK ATLAS S-ONE Handguard Cerakote Flat Dark Earth

Tiger Rock Complete Upper Receiver AR-15 5.56 NATO 10in Carbine Length 1-8 Twist w/ 10in M-LOK Handguard Black Large

Tiger Rock Complete Upper Receiver .300 Blackout AR 16in Pistol Length 1/8 Twist w/ 15in M-LOK Handguard Black Large

Aero Precision M4E1 Complete Upper Receiver 16in 5.56 M4 Carbine Barrel EQ-15 Gen 2 HG FDE Cerakote

Aero Precision MOD4 15 18 Inch 223 Wylde PROOF 5.56x45MM M4E1-T Complete Upper Receiver OD Green

Aero Precision M4E1-T PRO CHF M4 5.56mm 14.5 inch Complete Upper Receiver Hanson Mid Length 1-7 Twist A2 Birdcage Anodized Black

Aero Precision Complete Upper Receiver M4E1-E 5.56x45mm NATO 13.9in Government Mid Length 1 in 7 1/2 x 28 12.7in A2 Flash Hider Anodized Black

Caracal CAR814 A2 Patrol 5.56x45mm NATO Complete Upper 11.5 Barrel

American Defense Manufacturing .223 Wylde 16 Inch Barrel M-Lok Rail Upper Receiver Olive Drab 16 in

Tiger Rock Upper Receiver Billet Stripped Mod 1 AR-15 Black Small

Tiger Rock AR Complete Upper Receier 7.62X39 24in 16in Barrel HBAR Carbine 1x10 Twist 5/8x24 Thread 15in M-Lok Handguard Compensator Nitride Anodized

Luth-AR 16 in Light Weight 1-7 kit minus Lower Receiver w/coll. Stock KeyMod Black Carbine

Luth-AR 11.5 in Light Weight Complete Upper Barrel Receiver Assembly - 5.56 1x7 twist K-Mod Free Float Handguard Black 11.5

Rock River Arms A2 National Match Upper Receiver Assembly with National Match 1/2x1/2 .030 Hooded Aperture Rear Sight Black

Rock River Arms Upper Receiver EOP .223 Wylde 18 Inch Barrel Varmint Profile 1-8 Twist Free-Float Handguard Black

Rock River Arms Completed Upper Receiver Left Handed RAGE .223/5.56mm 16 Inch Barrel 1/2-28 Thread Free-Float Handguard A2 Flash Hider Black

CMMG Dissent Mk4 .350 Legend 16.1in Upper Group 1-16 Twist 1/2x28 TPI 25.5.in .750in Anodized Black