Shop 4,483 Deals on Upper Receivers

Aero Precision M5 Complete Upper Receiver 16in .308 CMV Mid Barrel w/ATLAS S-ONE 12in M-LOK Handguard Anodized Flat Dark Earth

Ghost Firearms Elite Complete Upper Receiver 7.62x39 16in Carbine Length 4150 Light HBAR Barrel 1-10 Twist 14in M-LOK Free Float Hand Guard A2 Flash

USED Radical Firearms RF Upper Assembly 10.5in 7.62x39 4150V HBAR Contour 1/10 Twist 10in RPR M-LOK A2 Flash Hider Black

Bear Creek Arsenal BC-10 .308 Winchester 16in Upper Receiver Heavy Mid-Length 1-10 5/8x24 Flash Hider Parkerized Tungsten

SLR B15 Billet Upper 5.56 Receiver Black SLRB-15-UPP 556

Maxim Defense Industries MDX 510 U.R.G. AR-15 7.62x39mm 10.3 inch Upper Receiver Pistol Length 1-10 Twist 5/8x24 HATEBRAKE Urban

Maxim Defense Industries MDX 508 U.R.G. AR-15 .300 AAC Blackout 8.5 inch Upper Receiver Pistol Length 1-7 Twist 5/8x24 HATEBRAKE Urban

Maxim Defense Industries MDX 508 U.R.G. AR-15 5.56x45mm NATO 8.5 inch Upper Receiver Pistol Length 1-7 Twist 1/2x28 HATEBRAKE Urban

Spikes Tactical Upper 5.56 16in Midlength LE w/12in BAR2 Rail

Guntec USA AR-15 Stripped Billet Upper Receiver Red

Grid Defense Complete Upper Receiver 5.56mm 10.5 inch Carbine Length 4150 Steel M4 Barrel 1-7 Twist A2 Flash Hider Burnt Bronze

Spikes Tactical Upper 5.56 16in Midlength LE w/9in BAR2 Rail Black

CMMG Upper Group Dissent Mk47 7.62X39 12.5in 1-10 Twist 5/8 X 24 TPI .750in 22in Sniper Grey

Rainier Arms Rellim Arms AR-15 300Blk Take Down Barrel Assembly Black 8 in RA-TDBA-300-8

CMMG Upper Group Dissent 45 Acp 16.1in 1-16 Twist 0.578 X 28 TPI 25.5in Midnight Bronze

Brigade Manufacturing AR Complete Upper Receiver Forged 9mm 16 inch Barrel FDE Mini Can 15 inch Rail No Charging Handle NO BCG

CMMG Upper Group Dissent 45 Acp 6.5in Hard Coat Anodized

Stag Arms AR-15 3-Gun Elite Right HandUpper Receiver 5.56 NATO 18in Barrel Heavy-Fluted Profile 1-8 Twist VG6 Gamma Black

Aero Precision Complete Upper Receiver M4E1-T .223 16in Wylde Barrel 12in M-LOK ATLAS S-ONE Handguard Anodized Black