Shop 4,476 Deals on Upper Receivers

AR-STONER LR-308 A3 Low Profile Billet Upper Receiver Stripped Matte

Rock River Arms NM A4 20" Classic Upper .223 Wylde 1:8 M-LOK Rifle-Length with BCG and CH, Black - Elite Accuracy - AR0784

Bushmaster 16" Classic Upper .223 Remington/5.56x45mm with 1:8 Twist Rate and M-LOK- Carbine-Length with BCG and CH- Black - 00-40011-BLK

Angstadt Arms 9mm Upper with 4.5" Barrel, Black - AAUT109045

HM Defense MonoBloc 9.5" AR-Style Upper Receiver 5.56x45mm/.223 Remington - 95MBUP556

HM Defense .223 Remington Upper with 16" Barrel, Black - 16MBUP556

HM Defense .223 Remington Upper with 16" Barrel, Black - 16MBUP556L

Patriot Ordnance Factory Minuteman 16.5" Complete Upper .350 Legend, Black - 1653

Patriot Ordnance Factory Minuteman 10.5" Complete Upper 5.56x45mm, Patriot Brown - 1817

Rock River Arms Legend CAR 16" SS Classic Upper .350 Legend 1:24 M-LOK Carbine-Length with BCG and CH, Black - 350L0326

Radian Weapons Model 1 MOE Upper M-LOK Rail with Charging Handle, Black - Reliable Carbine - R0193

Radian Weapons Model 1 17.5" MOE Upper .223 Wylde 1:8 M-LOK Rail Intermediate-Length with BCG and CH, Radian Gray - R0478

Radian Weapons Model 1 Complete Upper Flat Dark Earth .300 AAC Blackout 9 Barrel

Radian Weapons Model 1 MOE Upper M-LOK Rail with Charging Handle, Gray - Durable Performance - R0611

Complete AR-15 Build Kit - Aim Sports Kit in Sleek Black Finish - AR5CUB5

CMMG Resolute 16.10" Upper .300 Blackout with 1:7 M-LOK Rail - Carbine-Length w/out CH or BCG - Armor Black - 30BC40AAB

CMMG Dissent 10.50" Upper 5.56x45mm with 1:7 Twist Rate and M-LOK Rail - Pistol-Length with Charging Handle - Armor Black - 55B8D86AB

CMMG Resolute 16.10" Upper 9mm with 1:10 Twist Rate and M-LOK Rail - Carbine-Length with BCG and CH - Armor Black - 99BE6B6AB

CMMG Resolute 16.10" Upper 5.7x28mm with 1:9 Twist Rate and M-LOK Rail - Carbine-Length with BCG and CH - Armor Black - 57B40E4AB

CMMG Dissent 10.50" Upper 9mm with 1:10 Twist Rate and M-LOK Rail - Pistol-Length with Charging Handle - Armor Black - 99B80E4AB

Bowden Tactical AR Rifle Builder Kit - Complete Kit for Assembling AR Rifle - J27113

Tacfire Build Kit for AR-15 5.56 NATO/223 Remington Unassembled Rifle, Nitride Black - SSRK556LPK

Tacfire 16" Complete Upper Assembly .45 ACP 1:16, Black - BU-45ACP-16

Colt EPR 11.5" 5.56 AR-15 Upper, Black - LE6933EPR-CK