Shop 4,462 Deals on Upper Receivers

Faxon AR-15 Ascent Upper Receiver Assembly 5.56mm NATO 10.5" Barrel

Aero Precision AR-15 Upper Assembly 5.56x45mm NATO 16" Barrel MOE Mid-Length Handguard Black

Aero Precision LR-308 M5 Upper Assembly 308 Winchester 20" Steel Barrel 15" ATLAS R-ONE Handguard Black

Geissele Super Duty AR-15 Pistol Barreled Receiver 5.56x45mm NATO 11.5" Barrel Desert Dirt

Sons of Liberty Gun Works Half Complete Upper Receiver M4-89 5.56mm 10.5in 9.5in Combat Barrel M89 Rail A2 Flash Hider No BCG or CH Black

LanTac Raven Barrel .300 AAC Blackout 14.5 1:8 Twist

Aero Precision M4E1 Threaded 5.56mm Complete Upper Receiver 16in M4 Barrel 1-7 Twist A2 Flash Hider ATLAS R-ONE Handguard Black Anodized

Tacfire Build Kit, Black - SSRK300LPK

Colt M16 20" MOE Upper 5.56x45mm 1:7 w/BCG&CH, Black

Aero Precision M4E1-T Complete Upper, 18" .223 Wylde SS QPQ Rifle Length Barrel, RM16.6 - Ano

Alexander Ar15 Standard Upper 300Aac 16 in Black U300-ST

Sons of Liberty Gun Works .300 AAC Blackout Upper with 16" Barrel, Black - M489UPPER16300

Luth-AR Complete AR-15 Build Kit .223 Rem 16 Barrel

Colt Firearms LE6921CK-NHG Upper Kit Black 5.56 NATO 14.5-inch

Panzer AR57 ULT Upper Assembly 5.7x28mm 12" - AR57ULT-12

Primary Weapons Systems MK1 Mod-1M Upper for AR-15 .223 Wylde 11.8 Barrel

Faxon AR-15 Ascent Upper Receiver Assembly 22 ARC 16" Barrel

Rosco Bloodline Barrel 9mm 7.5 Barrel

LanTac Urban Tactical Upper .300 AAC Blackout 11.5 Barrel

CMMG Dissent 16.10" Upper .22 ARC with 1:7 Twist Rate and M-LOK Rail - Rifle-Length with Charging Handle - Charcoal Green - 28B940CCG

Del-Ton 20-inch Light Weight Rifle Kit

FosTech Outdoors Forged Upper Receiver Stripped for AR-15

Sons of Liberty Gun Works Broadsword-89 Upper Half 14.5in .223 Wylde Precision Barrel BS UPPER 13in M89 Rail P/W NOX Change/Add Muzzle Device BCG or

Sons of Liberty Gun Works AR-15 L89 Pinned and Welded Upper Receiver Assembly 5.56x45mm 14.5" Barrel 13.75" L89 M-LOK Rail with HUXWRX Flash Hider