Shop 4,462 Deals on Upper Receivers

Maxim Defense Industries PDX Complete Upper .300 AAC Blackout 5.5 Barrel

Aero Precision AR-15 16" MOE Upper 5.56x45mm 1:7 MOE M-LOK Rail SL Mid-Length, Black

Spikes Tactical .223 Rem/5.56 16" Barrel Complete Upper Assembly, Mil-Spec Phosphate Coated, Black Mid-Length - STU5435-MLS

Fortis Billet M4 Upper Stripped for AR15 223 Rem, 556 NATO - UBilletM4

FightLite MCR Dual-Feed 16.25" Upper 5.56x45mm 1:7 M-LOK Picatinny Rail, Black

Ballistic Advantage Modern Series Barrel 5.56 13.9 Mid Length

PWS AR-15 MK109 MOD 1-M Upper Receiver Assembly 300 Blackout 9.75" Barrel Long Stroke Piston

Spikes Tactical BBL 11.5 FN CHF W/ M4 EXT

Daniel Defense DDM4V7 Lightweight 16" 5.56 AR-15 Upper, Black - 23-128-02932-047

Geissele Automatics Super Duty Mod 1 16" 5.56x45mm Upper 1:7 M-LOK Rail with BCG and CH, Desert Dirt - 08-548S

CMMG Barrel 5.7X28mm 5" Black AR Rifles - 57DBC33

Colt EPR 5.56 M-LOK 16" AR-15 Upper, Black - LE6920EPR-CK

FightLite MCR Dual-Feed 12.50" Upper 5.56x45mm 1:7 Mil-Std 1913 Picatinny Rail, Black

Sons of Liberty Gun Works M4-L89 5.56x45mm 11.50"

Radian Weapons Model 1 MOE Upper M-LOK Rail with Charging Handle, Flat Dark Earth - Premium Carbine - R0414

Seekins Precision AR15 .300 BLK 8" 1:8" 5/8"x24 Threaded Black M4 Barrel 0010120003-F

PWS AR-15 MK109 MOD 2-M Upper Receiver Assembly 300 Blackout 9.75" Barrel Long Stroke Piston

Radian Weapons Upper/Handguard Set, Cerakote Finish, Brown, Fits AR-15, Includes 10 in MLOK Handguard, Radian Raptor-SD Charging Handle R0640

Sons of Liberty Gun Works L89

Sons of Liberty Gun Works Broadsword 89 V2 Upper Recevier 556NATO 12.5" A2 Flash Hider Low Profile Gas Block Black

Aero Precision M5 16" Upper .308 Win 1:7 M-LOK Rail Mid-Length, Black

Battle Arms WORKHORSE AR-15 Upper Receiver, 16" Barrel, No BCG or Charging Handle

Luth-AR Stripped NC15 Forged 308 Upper Receiver - 308-FTT-EA

Faxon Firearms ARAK-21 7.62x39mm 16" Quad Rail w/ BCG & CH, Black - URSSB762