Shop 4,464 Deals on Upper Receivers

Sons of Liberty Gun Works M4-89 Complete Upper M489UPPER-10.5-300, 300 Blackout, 10.5 in Combat Barrel

Ballistic Advantage AR-15 Assembled Upper Receiver

Bushmaster Bravo Zulu Upper Assembly 11.5in 5.56 NATO/.223 Remington Black

Aero Precision Stripped AR-15 Upper Receiver - Blem

Blackout Defense Complete Dual Taper Lock .223 Wylde Upper Receiver Group Slick Side 14.5in Mid Black

Blackout Defense Complete Dual Taper Lock .223 Wylde Upper Receiver Group Slick Side 12.5in Interpose Green

CMMG AR-15 Dissent Upper Receiver Assembly 45 ACP 6.5" Barrel

Radical Firearms Complete Upper Assembly 16in 6.5 Grendel 416R Medium Contour 1/9 Twist 15in MHR M-LOK Pepper Pot Brake Black

Radical Arms Upper .223/5.56Nato 16 Barrel Black with a 15Rail

Radical Firearms AR-15 Complete Upper Assembly 16in 7.62x39 4150V HBAR Contour 1/10 Twist 12in RPR M-LOK A2 Flash Hider Black

Radical Firearms Complete Upper Assembly 16in 300 AAC HBAR Contour 1/8 Twist 12in MHR M-LOK A2 Flash Hider Black

Radical Firearms RF Upper Assembly 16in 300 AAC HBAR Contour 1/8 Twist 12in MHR M-LOK A2 Flash Hider Black

CMMG Banshee 300 Upper 9mm 5 Barrel 30-Rounds

Aero Precision M4E1-T PRO 5.56x45 16 in Upper Receiver Hanson Mid Length 1-7 Twist A2 Birdcage Kodiak Brown 21D112-1

War Dog Industries Skeletonized Upper Receiver - Black

New Frontier Billet C-10 Side Charging Upper Receiver

LMT Short CQB Smooth Upper Receiver Assembly

Blackout Defense Complete Dual Taper Lock .223 Wylde Upper Receiver Group Slick Side 11.5in Carbine Black

Blackout Defense Complete Dual Taper Lock .223 Wylde Upper Receiver Group Slick Side 16in Mid Green

Blackout Defense Complete Dual Taper Lock .223 Wylde Upper Receiver Group Forward Assist 14.5in Mid Black

Blackout Defense Complete Dual Taper Lock .223 Wylde Upper Receiver Group Slick Side 14.5in Mid Burnt Bronze

Radical Firearms Complete Upper Assembly 16in 223 Wylde 416R HBAR Contour 1/8 Twist 15in RPR M-LOK A2 Flash Hider Black

Radical Firearms Complete Upper Assembly 24 inch 6.5 Grendel SS Match Medium Contour 15 inch MHR Pepper Pot Brake w/BCG and CH Black

Rock River Arms AR-15 A2 Upper Receiver Stripped Matte