Shop 4,464 Deals on Upper Receivers

Aero Precision M4E1-T SM15 Complete Upper 5.56 x 45 16inch HBAR Mid Length 1-7 Twist 1/2 x 28 Thread Cerakote FDE

Aero Precision Complete Upper Receiver M4E1 .300 Barrel EQ-7 HG No BCG/Charging Handle Gen 2 Anodized Black 8in APAR600211Q1

Rainier Arms Ruc Di 300BLK Partial Upper Receiver Black 10.7 in

JP Enterprises Stripped AR-15 Upper Receiver Low Profile Matte

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

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

Radical Firearms RF Upper Assembly 10.5in 5.56 M4 Contour 1/7 Twist 9in MHR M-LOK A2 Flash Hider Black

M16A2 Stripped Upper Receiver

Franklin Armory Billet Upper Receiver

Ke-9 Stripped Upper Receiver 9mm

Aero Precision EPC-9 Enhanced Complete Upper Receiver 16in 9mm EM-15in Handguard FDE

Q Sugar Weasel .300 AAC Blackout 7 inch Upper Receiver 1-5 Twist 5/8x24 Clear Anodize

Rock River Arms AR-15 A4 Upper Receiver Assembly 22 Long Rifle 20" Stainless Steel Barrel 13" Handguard Black

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

Blackout Defense Complete Dual Taper Lock .223 Wylde Upper Receiver Group Forward Assist 13.9in Mid FDE

Rock River Arms AR-15 Complete Upper Receiver 22 Long Rifle 16" Barrel

Ballistic Advantage Premium Series Barrel .223 Wylde 18 inch SPR Rifle 1-8 Twist 1/2 x 28 Thread Anodized Black

Stag Arms AR-15 Barreled Upper Receiver 300 AAC Blackout 16" Barrel

Sons of Liberty Gun Works Half Complete Upper Receiver M4-89 5.56mm 16in 15in Combat Barrel M89 Rail A2 Flash Hider No BCG or CH Black

Radical Firearms Complete Upper Assembly 16in 223 Wylde 416R HBAR Contour 1/8 Twist 12in RPR M-LOK A2 Flash Hider Black

Dirty Bird AR-15 Stripped Upper Receiver-Blem - Sniper Grey

Sons of Liberty Gun Works East India Starter Kit Combat Grade 13.9in .300 AAC Blackout Black

Ballistic Advantage Logic Series Barrel 5.56x45 10.3 inch Hanson Carbine 1-7 Twist 1/2 x 28 Thread Anodized Black

Rock River Arms LR-308 Predator HP Upper Receiver Assembly 308 Winchester, 7.62x51mm NATO 20" Stainless Steel Barrel 17" M-LOK Handguard Black