Shop 4,464 Deals on Upper Receivers

DEMO Ghost Firearms Upper Receiver Rifle Lower Parts Kit .300 Blackout 16in Pistol Moly Barrel 1-8 Twist 14in M-LOK Free Float Hand Guard A2 Flash

Ghost Firearms Upper Receiver Pistol Lower Parts Kit 7.62X39 10.5in Carbine Light HBAR Barrel 1-10 Twist 9in M-LOK Freefloat Handguard Tac Grape

Troy Upper Package with Medieval Flash Suppressor 300AAC 10.5in Black

Troy A3 Complete Upper .223 Rem / 5.56 NATO 16 Barrel

EDEMO American Tactical Imports AR-15 Stripped Poly Hybrid Upper Receiver Black ATIHUP200 EDEMO20

Phase 5 Weapon Systems Inc Complete P5T15 Rifle Upper Assembly 5.56mm 16 Inch Chrome Lined Barrel

Aero Precision M4E1-T Complete Upper Receiver .300 AAC Blackout 10in Pistol Length R-One M-LOK Handguard Black

DEMO Radical Firearms RF Upper Assembly 10.5in 300 AAC HBAR Contour 1/8 Twist 9in MHR M-LOK A2 Flash Hider Black

Aero Precision AR-15 5.56x45mm NATO Complete Upper Receiver w/ No Forward Assist 14.7in 5.56 Mid Pencil Barrel 12in M-LOK ATLAS S-ONE Handguard

LWRCI Complete Upper Receiver IC 5.56mm 16 inch Barrel 1-7 Twist Extended M-LOK Handguard Black

Guntec USA AR-15 9mm Dedicated Stripped Billet Upper Receiver Anodized Grey

Guntec USA AR-15 Stripped Billet Upper Receiver Anodized Irish Green

AT3 Tactical AR-15 Slick Side Billet Upper Receiver Gray

Bilson Arms Pump Style Forward Charging Upper Assembly 9mm FC PCC-UA 16 inch 1-10 Twist Cerakote Graphite Black

Radical Firearms RF Upper Assembly 16in 223 Wylde 416R HBAR Contour 1/8 Twist 12in RPR M-LOK A2 Flash Hider Black

Blackout Defense Complete Dual Taper Lock .300 AAC Upper Receiver Group Forward Assist 13.9in Pistol Burnt Bronze

Blackout Defense Complete Dual Taper Lock .300 AAC Upper Receiver Group Forward Assist 13.9in Pistol Green

Blackout Defense Complete Dual Taper Lock .300 AAC Upper Receiver Group Slick Side 13.9in Pistol FDE URGDTL300BLK13.9SLKFDE

Blackout Defense Complete Dual Taper Lock .300 AAC Upper Receiver Group Forward Assist 9in Pistol FDE

Stag Arms AR-15 Tactical Upper Receiver .300 AAC Blackout 8in Barrel GOV-CMV Profile 1-7 Twist 1/2x28 Left Hand VG6 Delta FDE

Aero Precision M4E1-T PRO 5.56x45 16 in Upper Receiver Hanson Mid Length 1-7 Twist A2 Birdcage Black 1D112-1

Del-Ton Pre-Ban Flat Top Light Weight Barrel Assembly 20in Standard/Rifle

CMMG MkG .45 ACP Banshee Fixed Ejection Upper Group Receiver 5in 1-16 Twist 0.578x28 TPI .750in Coyote Tan

CMMG 9mm Banshee Fixed Ejector Upper Group Receiver 5in 1-10 Twist 1/2 X 28 TPI 13.7in Titanium