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Shop 142 Deals on 5.56×45mm NATO Upper Receivers

Browse 5.56×45mm NATO Upper Receivers for sale at the lowest prices online.

Noveske Light Afghan Barrel 5.56 NATO / .223 Rem 14.5 Barrel for AR-15 - Noveske

Noveske Light Afghan Barrel 5.56 NATO / .223 Rem 14.5 Barrel for AR-15

$655.99 $474.63

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

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

MAP (Minimum Advertised Price) means this product is for sale at a lower price than what the manufacturer allows advertised.

Ballistic Advantage Performance Series 13.9" AR-15 Barrel, 5.56x45mm - BABL556037F - Ballistic Advantage

Ballistic Advantage Performance Series 13.9" AR-15 Barrel, 5.56x45mm - BABL556037F

MAP (Minimum Advertised Price) means this product is for sale at a lower price than what the manufacturer allows advertised.

Ballistic Advantage

Faxon Firearms ARAK-21 12.50" Upper 5.56x45mm, Black - Faxon Firearms

Faxon Firearms ARAK-21 12.50" Upper 5.56x45mm, Black

MAP (Minimum Advertised Price) means this product is for sale at a lower price than what the manufacturer allows advertised.

Sons of Liberty Gun Works L89 V2 5.56 16" Upper 5.56x45mm 1:7 M-LOK Rail Mid-Length, Black - Sons Of Liberty Gun Works

Sons of Liberty Gun Works L89 V2 5.56 16" Upper 5.56x45mm 1:7 M-LOK Rail Mid-Length, Black

MAP (Minimum Advertised Price) means this product is for sale at a lower price than what the manufacturer allows advertised.

Sons Of Liberty Gun Works

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

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

MAP (Minimum Advertised Price) means this product is for sale at a lower price than what the manufacturer allows advertised.

Fortis Manufacturing

Faxon Firearms ARAK-21 5.56x45mm 16" Quad Rail w/ BCG & CH, Black - URSSB556 - Faxon Firearms

Faxon Firearms ARAK-21 5.56x45mm 16" Quad Rail w/ BCG & CH, Black - URSSB556

MAP (Minimum Advertised Price) means this product is for sale at a lower price than what the manufacturer allows advertised.

Radian Weapons Model 1 Builder Kit Gray 5.56 14 Handguard - Radian Weapons

Radian Weapons Model 1 Builder Kit Gray 5.56 14 Handguard

MAP (Minimum Advertised Price) means this product is for sale at a lower price than what the manufacturer allows advertised.

Radian Weapons Model 1 MOE Upper M-LOK Rail with Charging Handle, Black - Advanced Tactical - R0428 - Radian Weapons

Radian Weapons Model 1 MOE Upper M-LOK Rail with Charging Handle, Black - Advanced Tactical - R0428

MAP (Minimum Advertised Price) means this product is for sale at a lower price than what the manufacturer allows advertised.

Sons of Liberty Gun Works .223 Remington Upper with 16" Barrel, Black - EXO3UPPER16556 - Sons Of Liberty Gun Works

Sons of Liberty Gun Works .223 Remington Upper with 16" Barrel, Black - EXO3UPPER16556

MAP (Minimum Advertised Price) means this product is for sale at a lower price than what the manufacturer allows advertised.

Sons Of Liberty Gun Works

Maxim Defense PDX 5.56x45mm Upper with 5.5" Barrel, Flat Dark Earth - MXM47812 - Maxim Defense

Maxim Defense PDX 5.56x45mm Upper with 5.5" Barrel, Flat Dark Earth - MXM47812

MAP (Minimum Advertised Price) means this product is for sale at a lower price than what the manufacturer allows advertised.

Battle Arms Authority Elite 16" Upper 5.56x45mm Free Float M-LOK Rail, Black - Battle Arms Development

Battle Arms Authority Elite 16" Upper 5.56x45mm Free Float M-LOK Rail, Black

MAP (Minimum Advertised Price) means this product is for sale at a lower price than what the manufacturer allows advertised.

Battle Arms Development

Daniel Defense DD4 RIII 16" Upper 5.56x45mm 1:7 M-LOK Mid-Length, Flat Dark Earth - Daniel Defense

Daniel Defense DD4 RIII 16" Upper 5.56x45mm 1:7 M-LOK Mid-Length, Flat Dark Earth

MAP (Minimum Advertised Price) means this product is for sale at a lower price than what the manufacturer allows advertised.

Daniel Defense AR15 10.3" 5.56 NATO MK18 RIII URG - Daniel Defense

Daniel Defense AR15 10.3" 5.56 NATO MK18 RIII URG

MAP (Minimum Advertised Price) means this product is for sale at a lower price than what the manufacturer allows advertised.

Aero Precision AR15 Complete Upper 5.56 / .223 Rem 10.5 Barrel - Aero Precision

Aero Precision AR15 Complete Upper 5.56 / .223 Rem 10.5 Barrel

MAP (Minimum Advertised Price) means this product is for sale at a lower price than what the manufacturer allows advertised.

Patriot Ordnance Factory P415 Edge 10.50" Complete Upper 5.56x45mm, Black - 1269 - Patriot Ordnance Factory

Patriot Ordnance Factory P415 Edge 10.50" Complete Upper 5.56x45mm, Black - 1269

MAP (Minimum Advertised Price) means this product is for sale at a lower price than what the manufacturer allows advertised.

Patriot Ordnance Factory

Daniel Defense AR15 18" 5.56 NATO MK12 SPR URG - Daniel Defense

Daniel Defense AR15 18" 5.56 NATO MK12 SPR URG

$1,755.00 $1,415.47

Anderson Manufacturing AM-15 Assembled Upper Receiver, Black - Anderson Manufacturing

Anderson Manufacturing AM-15 Assembled Upper Receiver, Black

Anderson Manufacturing

Patriot Ordnance Factory Renegade Plus 16.5" Complete Upper 5.56x45mm 1:8, Black - 907 - Patriot Ordnance Factory

Patriot Ordnance Factory Renegade Plus 16.5" Complete Upper 5.56x45mm 1:8, Black - 907

MAP (Minimum Advertised Price) means this product is for sale at a lower price than what the manufacturer allows advertised.

Patriot Ordnance Factory

Patriot Ordnance Factory Renegade Plus 10.5" Complete Upper 5.56x45mm 1:8, Black - 912 - Patriot Ordnance Factory

Patriot Ordnance Factory Renegade Plus 10.5" Complete Upper 5.56x45mm 1:8, Black - 912

MAP (Minimum Advertised Price) means this product is for sale at a lower price than what the manufacturer allows advertised.

Patriot Ordnance Factory

Patriot Ordnance Factory P415 Edge 16.5" Complete Upper 5.56x45mm 1:8, Black - 1309 - Patriot Ordnance Factory

Patriot Ordnance Factory P415 Edge 16.5" Complete Upper 5.56x45mm 1:8, Black - 1309

MAP (Minimum Advertised Price) means this product is for sale at a lower price than what the manufacturer allows advertised.

Patriot Ordnance Factory

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

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

MAP (Minimum Advertised Price) means this product is for sale at a lower price than what the manufacturer allows advertised.

Primary Weapons Systems

Tacfire 16" Complete Upper Assembly 5.56x45mm 1:8, Black - BU-556-16 - Tacfire

Tacfire 16" Complete Upper Assembly 5.56x45mm 1:8, Black - BU-556-16

$401.99 $239.57

Del-Ton Inc 16" M4 Carbine Rifle Kit 5.56x45mm 1:9, Black - RKT100 - Del-Ton

Del-Ton Inc 16" M4 Carbine Rifle Kit 5.56x45mm 1:9, Black - RKT100

$468.99 $388.22

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