Shop 4,481 Deals on Upper Receivers

ABC RIFLE COMPANY AR-15 7.62x39mm M-LOK Handguard Complete Pistol Upper Receiver w/BCG And Charging Handle 1-10 Twist 5/8x24 A2 Style Muzzle Brake

POF USA Revolution PD Complete Upper Black Andodized 6.5 Creedmoor 20"

POF USA Revolution PD Complete Upper Cerakote Burnt Bronze 308WIN 12.5"

POF USA Revolution PD Complete Upper Black Anodized 308WIN 12.5"

Spikes Tactical Upper 5.56 14.5in 16in OAL CHF Midlength w/Mid Length Handguards w/ Vortex

Radical Firearms AR-15 RF Upper Assembly 16in 7.62x39 4150V HBAR Contour 1/10 Twist 15in RPR M-LOK A2 Flash Hider Black

Aero Precision Complete Upper Receiver M4E1-T 7.5in 5.56 Barrel 7in M-LOK ATLAS S-ONE Handguard Cerakote Flat Dark Earth

CMMG DISSENT Mk4 5.56x45mm NATO 10.5in Upper Receiver 1-7 Twist .750in 1/2 X 28 TPI Charcoal Green

CMMG Mk4 6.5 Grendel Resolute Upper Group Receiver 16.1in Sniper Grey

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

CMMG MkG .45 ACP Resolute Upper Group Receiver 16.1in Sniper Grey

AT3 Tactical AR-15 Slick Side Billet Upper Receiver Titanium

Dark Storm Industries DS-15 AR-15 .300 AAC Blackout 16 inch Upper Receiver Pistol Length 1-8 Twist A2 Style Birdcage Flash Hider FDE

DEMO JARD AR Side Charge .223/5.56 Upper Receiver Assembly Complete Black

V Seven M4 Upper Assembly w/Minimal Forward Assist

HIPP Customs Complete Upper Receiver 25.5in 16in Barrel 1-7 Twist Hipp Lite Weight Handguard Black/Red 16.0in

Moriarti AR-15 5mm NATO 5 inch Upper Receiver Medium Micro Length 1-5 Twist 1/2x28 A2 Flash Hider Nitride

Grid Defense Complete Upper Receiver 9mm 9x19 Para 7.5 inch 4150 Light HBAR Barrel 1-10 Twist 7 inch Octagon M-LOK Rail A2 Flash Hider Tactical Grape

CMMG DISSENT Mk4 5.56x45mm NATO 6.5in Upper Receiver 1-7 Twist .750in 1/2 X 28 TPI Sniper Grey

CMMG Upper Receiver Assembly Mk4/AR15 Forward Assist Midnight Bronze

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

CMMG Mk4 .22LR Banshee Upper Group Receiver 4.5in Charcoal Green

Bear Creek Arsenal BC-15 .300AAC 16in Upper Receiver Heavy Carbine 1-8 5/8x24 Flash Hider Parkerized FDE

Bear Creek Arsenal BC-15 .300 Blackout 16in Bolt Action Style Upper Receiver Heavy Barrel 1-8 Twist 5/8x24 Flash Hider 416R