Shop 4,462 Deals on Upper Receivers

Luth-AR 14.50" Classic Upper 5.56x45mm 1:7 Carbine-Length w/BCG&CH, Black

Faxon Firearms 12.5" 338 ARC Complete Upper

Bravo Company MK2 Upper Receiver Laser Engraved

Aero Precision Complete Upper Receiver M4E1-T 5.56 16in M4 Barrel 15in M-LOK ATLAS S-ONE Handguard Anodized Black

Primary Weapons Systems MK109 MOD1-M Upper Receiver 9.75 inch Barrel 1-8 Twist Matte Black

APF Carbine Upper .350 Legend 16 Barrel w/ 5-Round Mag

Del-Ton AR Pistol Build Kit 5.56 11.5 Barrel Mil-Spec Upper

Del-Ton Government Profile Rifle Kit 5.56 NATO 20 Barrel

Stern Defense AR-15 Upper Receiver .45 ACP 16.1in Barrel 15in MLOK Rail SD BU45 Bolt SD CH1 Charging Handle SD CB45 Comp Break Black

ATI Milsport 7.50" Upper 5.56x45mm 1:8 M-LOK Rail, Black

FN Rifle Upper Black 5.56 / .223 Rem 20-inch

FN FN15 Upper Assembly 16-inch Carbine

Franklin Armory F17-X .17 WSM 20in Upper Kit w/ 10 Round Rifle Magazine 1-9 Twist 1/2x28 Aura Black

LMT Defense MRP-H M-LOK Railed Upper 7.62x51mm/6.5 Creedmoor/.260 Remington no BCG&CH, Black

Radical 6.5 Grendel Upper with 16" Barrel, Black - RF00421

Primary Weapons Systems MK116 MOD 1-M Upper .223 Wylde 16.1 Barrel

Spikes Tactical Barrel 5.56 - 8.1in CHF Pistol

Del-Ton Heavy Barrel Rifle Kit Black 5.56NATO/.223REM 20-inch

Aero Precision Assembled Upper Receiver w/o Auto Sear Cut, Black

Primary Weapons Systems MK116 MOD 2-M Upper .223 Wylde 16.1 Barrel

Complete AR-15 Pistol Build - Aim Sports Kit in Sleek Black Finish - AR5CUB9

PWS AR-15 MK111 MOD 2-M Upper Receiver Assembly 223 Wylde 11.85" Barrel Long Stroke Piston

PWS AR-15 MK114 MOD 2-M Long Stroke Gas Piston Upper Receiver Assembly 223 Wylde 14.5" Barrel M-Lok Pinned FSC556

TAPCO STRIPPED UPPER