Shop 4,464 Deals on Upper Receivers

Black Rain Ordnance Complete Upper Scout 5.56 Black

IMG AR-10 .308 12 Gauge 19in Complete Upper Receiver w/Two 5 Round Magazine Black

V Seven Harbinger 308 Complete Upper 1-10 twist 5/8x24 Thread Ultralight 18in Black 18HAR 308 FLT-UR

V Seven Enlightened 556/223 Complete Upper 14.5in 14.5 ENLI 556 FLT-UR

Dark Storm Industries DS-15 AR-15 5.56x45mm NATO 16 inch Upper Receiver SOCOM Profile Carbine Length 1-9 Twist A2 Style Birdcage Flash Hider OD Green

Dark Storm Industries DS-15 AR-15 5.56x45mm NATO 16 inch Upper Receiver SOCOM Profile Carbine Length 1-9 Twist A2 Style Birdcage Flash Hider FDE

Dark Storm Industries DS-15 Complete Upper 16" MOE 5.56 Threaded Black 5.56

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

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 Tactical Grape

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 .300 Blackout 10.5 inch Pistol Length 4150 Steel Light HBAR Barrel 1-8 Twist 10.5 inch Hand Guard A2 Flash Hider

HIPP Customs AR-15 Stripped Upper Receiver Cerakote Black

Outerwild AR15 Complete Premium Upper Receiver 5.56NATO 14.5in 1-7 Twist 13in M-LOK Handguard Black Anodize

ABC RIFLE COMPANY AR-15 7.62x39mm Micro Pistol Build 5in Barrel 4in M-LOK Handguard Upper Receiver Olive Drab Green

ABC RIFLE COMPANY AR-15 .300 AAC Blackout Complete Build 16in Barrel 15in Lightweight Hybrid M-LOK Handguard Upper Receiver 5/8x24 Nitride Sniper Grey

ABC RIFLE COMPANY AR9 9mm Luger Pistol Billet 4in Barrel M-LOK Handguard Complete Upper Receiver w/BCG And Charging Handle Tungsten

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

CMMG Upper Receiver Assembly Mk4/AR15 Forward Assist Tungsten

CMMG Mk4 .22LR Banshee Upper Group Receiver 4.5in 1-16 Twist 1/2 X 28 TPI 12.8in Tungsten

DEMO Daniel Defense Upper Receiver with Flash Hider Assembly DD4 RIII URG 5.56x45mm NATO 25 inch 16 inch Barrel Government Profile Mid-length 1-7

Stag Arms AR-10 Marksman Right Hand Upper Receiver 6.5 Creedmore 22in Barrel BULL Profile 1-10 Twist 5/8X24 Thread VG6 Gamma FDE

Aero Precision M4E1-T Complete Upper 14.5in 5.56 Carbine Length BRL 12in M-LOK AR15 ATLAS R-ONE HG FDE

Aero Precision M5 Complete Upper Receiver 16in .308 Mid SS Barrel w/ATLAS R-ONE 12in M-LOK Handguard Anodized Black

Grid Defense Complete Upper Receiver .300 Blackout 7.5in Pistol Length 4150 Light HBAR Barrel 1-8 Twist 9in Octagon M-LOK Hand Guard Dimpled Flash Can