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556 UPPERS - 556 NATO UPPERS

All our 5.56 NATO Uppers can be configured to your specifications. Your 556 Complete Upper can be customized with a matched optic, muzzle device, rail, bolt carrier group, magazine, or charging handle. Our 556 Upper Receivers are turn-key and ready to shoot out of the box.

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5.56mm NATO (5.56x45mm) is the ammunition used by the standard-issue US Military M4, making it inexpensive and widely available. The 556 NATO round is extremely effective across a wide range of applications.

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5.56 NATO Uppers For Sale

What is a 5.56 NATO Upper Receiver?

5.56 NATO is the most popular type of upper receiver for the AR-15 platform and it is what many ‘stock’ AR15’s use. Upgrading to a higher quality 556 NATO upper will improve the accuracy and effectiveness of your AR15 while maintaining all of the advantages of low cost and high availability associated with the 556 NATO ammunition.

What is the muzzle velocity and maximum range of the 5.56 NATO Upper Receiver?

The muzzle velocity sits at around 1800 feet per second, with a 180-grain round. The maximum range of a 5.56 NATO upper receiver is typically around 400 yards.

What BCG do I use with a 556 NATO Upper?

556 NATO Uppers use the standard 223/556 Bolt Carrier Group (BCG).

What Magazine do I use with a 556 NATO Upper?

556 NATO Uppers use the standard 223/556 Magazine.

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