Shop 4,464 Deals on Upper Receivers

Brownells BRN-180S AR-15 Upper Receiver Gen 2 Assembly .300 Blackout 10 Barrel

CMMG DISSENT Upper Receiver Mk4 300BLK 10.5in 1-7 Twist 5/8x24 Thread Zeroed Linear Compensator Charcoal Green

Alexander Arms AR15 Stripped Rifle Upper 6.5 Grendel 18 in Barrel Carbine Length 1-7.5 Twist 5/8x24 Thread Black

FosTech Flite Elite AR-15 Stripped Upper Receiver, Tungsten - 6880TUN

Aero Precision M5 Complete Upper Receiver 20in .308 SS Rifle Barrel w/ATLAS R-ONE 15in M-LOK Handguard Anodized Black

Aero Precision Complete Upper Receiver M4E1-E 16in .223 Wylde Fluted Barrel EM-15 Handguard Gen 2 Anodized Black

Aero Precision M5 Complete Upper Receiver 20in .308 SS Rifle Barrel w/ATLAS S-ONE 15in M-LOK Handguard Anodized Black

Aero Precision Complete Upper Receiver M4E1-T 14.5in 5.56 Carbine Length Barrel 12in M-LOK ATLAS S-ONE Handguard Flat Dark Earth

Aero Precision M4E1 Threaded Complete Upper Receiver 5.56 NATO 14.5 in Barrel Government Profile 1-7 Twist 1/2x28 Thread 12 in ATLAS S-ONE M-LOK

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

AR-STONER AR-15 A3 Extreme Duty Upper Receiver Assembled Aluminum Black

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

Sons of Liberty Gun Works East India Starter Kit Combat Grade FSB 16in w/ Front Sight Base Black

Luth-AR Lightweight Complete Upper Barrel Receiver Assembly 5.56mm 20in 11.5in HBAR Carbine 1x9 1/2x28 Picatinny Key MOD A2 Flash Hider Anodized

CMMG DISSENT Upper Receiver Mk4 300BLK 6.5in 1-7 Twist 5/8x24 Thread Zeroed Linear Compensator Midnight Bronze

Wilson Combat Upper Receiver 5.56x45mm NATO AR-15 Forged Anodized Black

Aero Precision M4E1 Threaded .223 Wylde Complete Upper Receiver 18in Fluted Barrel 1-8 Twist A2 Flash Hider ATLAS R-ONE Handguard Black Anodized

Geissele AR-15 Super Duty MOD1 Upper Receiver Assembly 5.56x45mm 16" HBAR Barrel M-LOK Desert Dirt

Geissele AR-15 Super Duty MOD1 Upper Receiver Assembly 5.56x45mm 14.5" Pinned and Welded HBAR Barrel M-LOK Black

CMMG AR-15 Banshee Upper Receiver Assembly 9mm Luger 5" Barrel

Aero Precision M5 Complete Upper Receiver 18in .308 SS Rifle Barrel w/ATLAS S-ONE 15in M-LOK Handguard Anodized Flat Dark Earth

Geissele AR-15 Super Duty MOD1 Upper Receiver Assembly 300 AAC Blackout 8" Cold Hammer Forged Barrel M-LOK Black

Aero Precision M4E1 Enhanced No Forward Assist Complete Upper Receiver 16in 5.56 Mid EM15 Anodized Black

Aero Precision M5E1 Complete Upper Reciever .308 20in Rifle Barrel 1-10 Twist 5/8x24 Thread Free-Float Handguard Anodized Black