Shop 4,464 Deals on Upper Receivers

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 Blue Titanium

Grid Defense Complete Upper Receiver 9mm 9x19 Para 5.5 inch 4150 Light HBAR Barrel 1-10 Twist 7 inch Octagon M-LOK Rail Dimpled Flash Can Tactical

Bear Creek Arsenal BC15 .458 SOCOM 16in Upper Receiver Heavy Carbine 1-14 5/8x32 Flash Hide Parkerized

Bear Creek Arsenal BC-15 5.56 NATO 16in Upper Receiver M4 Carbine 1-7 1/2x28 Flash Hider Black Nitride

Bear Creek Arsenal BC-15 5.56 NATO 16in Upper Receiver M4 Barrel Carbine Length 1-7 Twist 1/2x28 Flash Hider Parkerized

Tiger Rock AR-15/47/9/300 Stripped Upper Receiver Cerakote Pink Medium

Aero Precision Complete Upper Receiver M4E1 .300 Barrel EQ-7 HG No BCG/Charging Handle Gen 2 FDE Cerakote 8in APAR600212Q1

Outerwild AR15 Complete Premium Upper Receiver Billet .223 Wylde 16in 1-7 Twist 15in M-LOK Handguard Black Anodize

Outerwild AR15 Complete Premium Upper Receiver Billet 5.56NATO 16in 1-7 Twist 15in M-LOK Handguard Black Anodize

Spikes Tactical Upper 5.56 14.5in 16in OAL Midlength Lightweight LE w/9in SAR3 Rail w/ Vortex FH

POF USA Revolution DI Complete Upper Cerakote Burnt Bronze 6.5 Creedmoor 20"

ABC RIFLE COMPANY AR-15 .300 AAC Blackout Micro Pistol Build 5in Barrel 4in M-LOK Handguard Upper Receiver Flat Dark Earth

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

ABC RIFLE COMPANY AR-15 .223 Remington/5.56x45mm NATO 16in Barrel 12in Quad Rail Handguard Upper Receiver w/Charging Handle 1-8 Twist 1/2x28 A2 Style

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

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

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

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

TRYBE Defense Magnite AR-15 .300 BLK 10.5in Complete Upper Receiver Pistol Length 1-8 5/8x24 Black

Spikes Tactical Upper 5.56 16in CHF Midlength w/ 9in SAR3 Rail

Spikes Tactical Upper 5.56 16in CHF Midlength w/ 12in SAR3 Rail

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

Grid Defense Complete Upper Receiver 9mm 9x19 Para 5.5 inch 4150 Light HBAR Barrel 1-10 Twist 7 inch Octagon M-LOK Rail Dimpled Flash Can Blue

Bear Creek Arsenal BC-15 .223 Wylde 16in Upper Receiver Heavy Carbine 1-8 1/2x28 Flash Hider Parkerized FDE