Shop 4,464 Deals on Upper Receivers

Rock River Arms RRAGE AR-15 Slick-Side Stripped Upper Receiver

EDEMO Matador Arms Upper Reciever Mat-9K 9mm 5 inch Barrel 1-10 Twist 1/2x28 Threads FDE EDEMO1 Used Condition Fair

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

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

Guntec USA AR-15 Stripped Billet Upper Receiver w/15in Ultralight Series M-Lok Handguard Anodized Green

Aagil Arms Complete AR-15 .223 Wylde Upper Assembly 16in Stainless Steel Length Carbine 1-8 Twist w/ 15in Key Mod Anodized Black Medium

Guntec USA AR-15 Complete 9mm Upper Receiver Mil-Spec Charging Handle 6.75 inch M-Lok Handguard 7.5 inch Contour 4150 Barrel 1-10 Twist 1/2x36

Bilson Arms Pump Style Forward Charging Upper Assembly 556FC-UA 16 inch 1-7 Twist Cerakote Sniper Green & Grey

Evolve Weapons Systems Complete Upper Receiver 14.5in Mid Length Gas System M-LOK Handguard Black

Angstadt Arms Complete Upper Assembly AR-15 4 in Handguard 4.5 in Barrel A2 Flash Hider Picatinny/M-LOK 1/2x36 Black

DPMS 223 A1 16-inch LW Barrel Assembly

Caracal CAR814 A2 Patrol 5.56x45mm NATO Complete Upper 16in Barrel

Blackout Defense Complete Dual Taper Lock .223 Wylde Upper Receiver Group Forward Assist 11.5in Carbine Green

Del-Ton Pre-Ban Heavy Profile Rifle Complete Upper Receiver 5.56x45mm NATO 11.5in Pistol Length Black

Rock River Arms A2 National Match Upper Receiver Assembly with National Match 1/4x1/4 .030 Hooded Aperture Rear Sight Black

Rock River Arms Upper Receiver EOP .223 Wylde 20 Inch Barrel Varmint Profile 1-8 Twist Free-Float Handguard Black

CMMG Dissent Mk4 .350 Legend 16.1in Empire Profile Upper Group Hard Coat Anodized

CMMG Upper Group Dissent Mk47 7.62X39 16.1in Empire Profile Non-Threaded Armor Black

CMMG MkG .45 ACP Banshee Fixed Ejection Upper Group Receiver 8in 1-16 Twist 0.578x28 TPI .750in Midnight Bronze

CMMG 9mm Banshee Fixed Ejector Upper Group Receiver 8in 1-10 Twist 1/2 X 28 TPI 16.5in Titanium

Aero Precision M4E1 Enhanced No Forward Assist Complete Upper Receiver 10.5in 5.56 Carbine EM-9.3 FDE

Aero Precision Complete Upper Receiver M4E1-T 5.56x45mm NATO 18in Government Rifle Length 1 in 7 1/2 x 28 15in A2 Flash Hider Cerakote FDE

CMMG Upper Group Dissent 45 Acp 6.5in 1-16 Twist 0.578 X 28 TPI Midnight Bronze

Radical Firearms Complete Upper Assembly 16in 458 SOCOM .936 1/14 Twist 15in MHR M-LOK Panzer Brake Black