Home /Categories / Upper Receivers / 5.56x45mm NATO

Shop 142 Deals on 5.56x45mm NATO Upper Receivers

Browse 5.56x45mm NATO Upper Receivers for sale at the lowest prices online.

Del-Ton Inc 16" Heavy Mid Length Rifle Kit 5.56x45mm 1:9, Black - RKT104 - Del-Ton

Del-Ton Inc 16" Heavy Mid Length Rifle Kit 5.56x45mm 1:9, Black - RKT104

$535.59 $372.99

Tacfire 7" Complete Upper Assembly 5.56x45mm 1:8, Black - BU-556-7 - Tacfire

Tacfire 7" Complete Upper Assembly 5.56x45mm 1:8, Black - BU-556-7

$366.99 $232.78

Tacfire Upper 5.56x45mm, Black Anodized - UP01C2 - Tacfire

Tacfire Upper 5.56x45mm, Black Anodized - UP01C2

Tacfire 5" Complete Upper Assembly 5.56x45mm 1:5, Black - BU-556-5 - Tacfire

Tacfire 5" Complete Upper Assembly 5.56x45mm 1:5, Black - BU-556-5

$418.99 $269.38

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

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

$780.99 $663.42

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

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

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

VKTR Industries VK-1 13.7" Upper 5.56x45mm 1:7 M-LOK Rail with BCG and CH, Armor Black - V-4027-3410-004-RP - Vktr Industries

VKTR Industries VK-1 13.7" Upper 5.56x45mm 1:7 M-LOK Rail with BCG and CH, Armor Black - V-4027-3410-004-RP

$2,374.99 $1,403.51

Vktr Industries

Del-Ton Pre-Ban 16" Classic Upper 5.56x45mm 1:9 Carbine-Length, Black - Del-Ton

Del-Ton Pre-Ban 16" Classic Upper 5.56x45mm 1:9 Carbine-Length, Black

$350.00 $306.47

Patriot Ordnance Factory Minuteman 10.5" Complete Upper 5.56x45mm, Black - 1654 - Patriot Ordnance Factory

Patriot Ordnance Factory Minuteman 10.5" Complete Upper 5.56x45mm, Black - 1654

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

Patriot Ordnance Factory

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

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

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

Black Rain Ordnance Flat Top Milled Upper Receiver, Black - BRO-MUR-2 - Black Rain Ordnance

Black Rain Ordnance Flat Top Milled Upper Receiver, Black - BRO-MUR-2

$326.99 $186.99

Black Rain Ordnance

Maxim Defense PDX 5.56x45mm Upper with 5.5" Barrel, Black - MXM47813 - Maxim Defense

Maxim Defense PDX 5.56x45mm Upper with 5.5" Barrel, Black - MXM47813

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

Bushmaster M4 Patrolman's 20" AR-Style Upper Receiver 5.56x45mm 1:7, Black - 0040008BLK - Bushmaster

Bushmaster M4 Patrolman's 20" AR-Style Upper Receiver 5.56x45mm 1:7, Black - 0040008BLK

$705.99 $626.26

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

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

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

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

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

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

Gemtech GVAC 16. 10" Upper Receiver 5.56x45mm 1:8, Black - 13833 - Gemtech

Gemtech GVAC 16. 10" Upper Receiver 5.56x45mm 1:8, Black - 13833

$916.99 $660.99

TacFire AR-15 Pistol Build Kit, Black - Tacfire

TacFire AR-15 Pistol Build Kit, Black

$502.99 $328.30

Anderson Manufacturing 16" Classic Upper 5.56x45mm 1:8 Carbine-Length, Black - Anderson Manufacturing

Anderson Manufacturing 16" Classic Upper 5.56x45mm 1:8 Carbine-Length, Black

$531.99 $325.58

Anderson Manufacturing

VKTR Industries VK-1 5.56x45mm 16" 1:7 M-LOK Rail w/ BCG & CH, Black - V-4027-3410-001-RP - Vktr Industries

VKTR Industries VK-1 5.56x45mm 16" 1:7 M-LOK Rail w/ BCG & CH, Black - V-4027-3410-001-RP

$2,249.99 $1,364.00

Vktr Industries

Del-Ton Inc 16" Complete Upper Assembly 5.56x45mm 1:7, Black - DT1040 - Del-Ton

Del-Ton Inc 16" Complete Upper Assembly 5.56x45mm 1:7, Black - DT1040

$461.20 $304.99

Del-Ton Inc 16" Heavy Carbine Rifle Kit 5.56x45mm 1:9, Black - RKT101 - Del-Ton

Del-Ton Inc 16" Heavy Carbine Rifle Kit 5.56x45mm 1:9, Black - RKT101

$450.00 $352.93

Del-Ton Pre-Ban 16" Classic Upper 5.56x45mm 1:9 Mid-Length, Black -

Del-Ton Pre-Ban 16" Classic Upper 5.56x45mm 1:9 Mid-Length, Black

$350.00 $304.45

Patriot Ordnance Factory Minuteman 16.5" Complete Upper 5.56x45mm 1:8, Patriot Brown - 1815 - Patriot Ordnance Factory

Patriot Ordnance Factory Minuteman 16.5" Complete Upper 5.56x45mm 1:8, Patriot Brown - 1815

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 Minuteman 16.5" Complete Upper 5.56x45mm 1:8, Black - 1652 - Patriot Ordnance Factory

Patriot Ordnance Factory Minuteman 16.5" Complete Upper 5.56x45mm 1:8, Black - 1652

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

Patriot Ordnance Factory

4 / 6