Shop 49 Deals on 223 Remington Upper Receivers

Primary Weapons Systems MK116 Pro Upper 223 Wylde/556NATO 16.1" Barrel, Black - 19-PM116UA0B

Bushmaster A3 Patrolman .223 Rem/5.56 16" Barrel Flat-Top Complete Upper Assembly - 91822

Aero Precision M4E1-T Upper 5.56 10.5 Barrel No BCG/CH

Aero Precision M4E1-T Upper Flat Dark Earth 5.56 14.5 Barrel No BCG/CH

Sharps Bros AR-15 223 Rem/556NATO Complete Upper Receiver - SBBU01

Aero Precision M4E1-T Upper Flat Dark Earth 5.56 10.5 Barrel No BCG/CH

Troy Industries .223 Remington Upper with 16" Barrel, Black - SUPGA3M16BT00

Troy Industries .223 Remington Upper with 16" Barrel, Black - SUPGA4S16BT00

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

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

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

Q LLC Sugar Weasel .223 Remington Upper with 13" Barrel, Black, Tan - ACCSW55613INUPPER

Larue Stripped Upper Receiver, Black

Bowden Tactical Pistol Build Kit, Black

Bushmaster QRC II LTW 16" Classic Upper 5.56x45mm NATO 1:7 Carbine Length, Black

FN 14" SCAR 16S Barrel, 1:7, .223 Remington - 98804

Radian Weapons Model 1 Builder Kit Flat Dark Earth 5.56 8.5 Handguard

Sons of Liberty Gun Works .223 Remington Upper with 13.7" Barrel, Black - M489UPPER13.7556

Sons of Liberty Gun Works Half Complete Upper Receiver M4-89 5.56mm 11.5in 10.5in Combat Barrel M89 Rail A2 Flash Hider No BCG or CH Black

Sons of Liberty Gun Works Half Complete Upper Receiver M4-EXO3 5.56mm 11.5in 10.5in Combat Barrel EXO3 Rail A2 Flash Hider No BCG or CH Black

Sons of Liberty Gun Works .223 Remington Upper with 13.7" Barrel, Black - PATROLSLUPPER13.7556

Bowden Tactical Pistol Build Kit, Black