Shop 4,464 Deals on Upper Receivers

Ghost Firearms Upper Receiver Pistol Lower Parts Kit 7.62X39 10.5in Carbine Light HBAR Barrel 1-10 Twist 9in M-LOK Freefloat Handguard A2 Birdcage

FM Products FM-9 AR 9mm Forward Charging Upper Receiver w/ Micro Brake 9x19mm Parabellum 10 inch 8.5in Barrel Blast Diffuser Black

FM Products FM-15 .223 Wylde 13.9in Mid Length Gen 2 Upper Reciever 1-8 Twist Rate 1/2x28 TPI Black

KAK Complete AR10 Upper Receiver- 308, 16" Barrel, 15" MLOK

KAK Complete AR15 Upper Receiver - 9mm - 4" Barrel - 5.5" MLOK

FM Products MIKE-45 .45 ACP Complete Upper Receiver Kit 10 inch Barrel Front Charge Black

USED Matador Arms Upper Reciever Montgo 9mm 12.125in 5.5in 1/2x28in Thread Black MAC176 EDEMO3 Condition Parts Only/Salvage Defective

Guntec USA AR-15 Complete 5.56 Upper Receiver w/o Lower Parts Kit N.1 15in Ultralight M-Lok Handguard MLS Gen 2 Stock Assembly Carbine Length .750 Gas

Aagil Arms Ted Nugent's Signature Series AR-15 Complete .300 Blackout Upper Receiver Assembly w/ 15in American Flag Cerakote

Aagil Arms Complete AR-15 .223 WYLDE Upper Assembly 16in Barrel Length Carbine 1-7 Twist w/ 15in Clamp on Key Mod Cerakote Olive Drab Green Medium

ZEV Technologies MEGA AR15 MML Billet Stripped Upper Receiver w/ 12'' M-LOK Handguard Black

USED LaRue Tactical Upper Reciever Complete .308 Keymod Upper 18 in Barrel Urban Dark Earth Medium DPMS Cut

CMMG Upper Group Resolute Mk4 .22Lr 16.1in 1-16 Twist 1/2 X 28 TPI 24in Midnight Bronze

Luth-AR AR-15 A1 Stripped Upper Receiver

American Defense Manufacturing 5.56 14.5 Inch Barrel M-Lok Rail Upper Reciever Olive Drab 14.5 in

American Defense Manufacturing M-Lok Rail Upper Receiver .300 Blackout 10.5in ADM Nitrite BCG Black

VKTR Industries VK-1 5.56x45mm NATO 11.5 inch Upper Receiver Heavy Carbine Length 1-7 Twist FDE

Sharps Rifle Company 20in 25-45 Sharps Complete Upper Assembly HBAR Profile Silver

Rock River Arms Upper Receiver EOP .223 Wylde 24 Inch Barrel Varmint Profile 1-8 Twist Free-Float Handguard Black

Radical Firearms RF Upper Assembly 18in 223 Wylde 416R HBAR Contour 1/8 Twist 15in MHR M-LOK A2 Flash Hider Black

Radical Firearms Upper Assembly 10.5 inch 300 AAC HBAR Contour 10 inch FQR w/BCG and CH Black

Aero Precision M4E1 Complete Upper Receiver 18in .223 Wylde Rifle Barrel EQ-15 HG Gen 2 Anodized Black

Tiger Rock Complete Upper Receiver AR 9mm 4.5in Pistol Length 1-10 Twist Super Slim Keymod Handguard Black Nitride Finish Black Large

Stag Arms AR-10 Long Range Right Hand Upper Receiver 308 Winchester 20in Barrel HBAR-CMV Profile 1-10 Twist 5/8X24 Thread VG6 Gamma FDE