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  2. 2793 FPS 1 item
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  18. 3265 FPS 1 item
  19. 3270 FPS 4 items
Applications
  1. Defensive 6 items
  2. Hunting 3 items
  3. Precision / Match 4 items
  4. Target 25 items
Round Count
  1. 20 21 items
  2. 30 3 items
  3. 50 4 items
  4. 100 1 item
  5. 120 1 item
  6. 150 5 items
  7. 180 1 item
  8. 200 4 items
  9. 420 1 item
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  12. 800 1 item
  13. 840 2 items
  14. 1000 4 items
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  2. Out of Stock 18 items
Customer Rating
  1. 5
    8 items
  2. 4
    & up     22 items
  3. 3
    & up     23 items

5.56 NATO Ammo

Shop 5.56 Ammunition Online — Find the Best Deals on Top Brands

America is home to over 20 million AR-15-style rifles, and if you’re looking for ammo for yours, you’ve come to the right place. GunMag Warehouse has all the 5.56x45mm NATO you need.

Choose between industry-leading brands like PMC and Hornady without blowing your budget. A wide selection of varying bullet weights, muzzle velocities, and round counts makes it even easier to find an option that works for you.

One of the biggest advantages of buying your rounds from GunMag Warehouse is our bulk discounts and regular sales that give us the best prices online for ammunition. Whether you need ammo for the range, competition shooting, self-defense, or hunting, GunMag Warehouse has the 5.56 you need in stock.

Stock up today and never overpay for 5.56 ammunition again.

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Frequently Asked Questions

Is 5.56 the same as .223?

No, the 5.56 NATO and .223 Remington are different cartridges, although they have many similarities. Both are synonymous with the AR-15 platform, and the 5.56 is based on the .223 Remington, but there are slight differences in their specifications.

Generally speaking, you can fire .223 rounds out of a firearm chambered in 5.56 NATO, but not the other way around. A 5.56 round may produce higher pressures than what a .223-chambered firearm is made to handle.

What caliber is 5.56?

The 5.56 NATO is a 22-caliber round, as it has a bullet diameter of 0.224 inches.

What is green tip 5.56 ammo?

Green tip 5.56 ammunition is a heavier, steel-tipped version of the 5.56 designed for more penetration. Despite some rumors, these are not armor-piercing rounds, but they will travel further through barriers than standard alternatives. As such, some ranges ban green tips to prevent damage to their backstops.

Is black tip 5.56 legal​?

In a military context, a black tip designates a true armor-piercing round, so these black tip 5.56 rounds are not available to civilians. However, you may find 5.56 NATO ammo with a black tip, as polymer-tipped ammo comes in all sorts of colors. Just know that these rounds are not the same as a military black tip and are not armor-piercing.

Is 5.56x45 the same as 5.56 NATO?

Yes, 5.56x45 and 5.56 NATO refer to the same cartridge. You’ll also see the caliber listed as 5.56x45mm NATO. The “45” here comes from the cartridge’s 45-millimeter case length.

Can you hunt deer with 5.56?

The 5.56 NATO is more than capable as a hunting cartridge, but whether you can legally hunt with it depends on your local legislation. Some states require a larger minimum caliber to hunt larger game like deer, and the 5.56 may fall just shy of these requirements. Other states may allow hunting with 5.56 but require hollow points or similar expanding ammo types to ensure an ethical kill. Always double-check your local laws before purchasing ammunition.