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Shop 52 Deals on 5.56×45mm NATO Build Kits

Browse 5.56×45mm NATO Build Kits for sale at the lowest prices online.

Handguards & Rails

Handguard & Rails

Forend & Handguard Parts

Optics & Mounting

Midwest Industries

Troy Industries

Geissele Automatics

Sons Of Liberty Gun Works

Ar-15 M4-Exo3-16 Build Kit - Ar-15 M4-Exo3-16 5.56 Build Kit 16'''' - Sons Of Liberty Gun Works

Ar-15 M4-Exo3-16 Build Kit - Ar-15 M4-Exo3-16 5.56 Build Kit 16''''

Sons Of Liberty Gun Works

Ar-15 Super Duty Rifle Build Kit 5.56mm - Ar-15 5.56 Super Duty Rifle Build Kit Odg - Geissele Automatics

Ar-15 Super Duty Rifle Build Kit 5.56mm - Ar-15 5.56 Super Duty Rifle Build Kit Odg

Geissele Automatics

Aero Ar-15 Assembled Upper 5.56mm Build Kits - Build Kit 5.56mm Assembled Upper 16'''' Mid-Length 12'''' Hg Black - Aero Precision

Aero Ar-15 Assembled Upper 5.56mm Build Kits - Build Kit 5.56mm Assembled Upper 16'''' Mid-Length 12'''' Hg Black

Aero Ar-15 Assembled Upper 5.56mm Build Kits - Build Kit 5.56mm Assembled Upper 16'''' Carbine 12'''' Hg Black - Aero Precision

Aero Ar-15 Assembled Upper 5.56mm Build Kits - Build Kit 5.56mm Assembled Upper 16'''' Carbine 12'''' Hg Black

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