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    5.56mm NATO
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  133. 5.45 x 39mm 4 items
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  135. 5.7 x 28mm 8 items
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  159. 7.62 x 25mm 1 item
  160. 7.62 x 39mm 23 items
  161. 7.62 × 51mm NATO 13 items
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Bullet Weight
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Muzzle Velocity
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  19. 3270 FPS 4 items
Applications
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  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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  14. 1000 4 items
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Customer Rating
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  2. 4
    & up     22 items
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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.

  1. Hornady Frontier Cartridge 5.56 NATO Ammo 55gr M193 FMJ
    Hornady Frontier Cartridge 5.56 NATO Ammo 55gr M193 FMJ
    (170)
    $19.99 $499.99 $8.99 $209.99 Save $290.00 $0.42 $0.50 per round
  2. PMC X-Tac 5.56 NATO Ammo 55gr FMJBT
    PMC X-Tac 5.56 NATO Ammo 55gr FMJBT
    (182)
    $16.99 $849.99 $9.49 $439.99 Save $410.00 $0.44 $0.47 per round
  3. PMC X-Tac 5.56 NATO Ammo 62gr M855 Green Tip LAP
    PMC X-Tac 5.56 NATO Ammo 62gr M855 Green Tip LAP
    (339)
    $19.99 $449.99 $10.49 $449.99 Save $9.50 $0.45 $0.52 per round
  5. Hornady Black 5.56 NATO Ammo 62gr FMJ 20 Rounds
    Hornady Black 5.56 NATO Ammo 62gr FMJ 20 Rounds
    (31)
    $23.99 $16.49 Save $7.50 ($0.82 per round)
  6. MKE 5.56 NATO Ammo 62gr SS109 LAP 30 Rounds
    MKE 5.56 NATO Ammo 62gr SS109 LAP 30 Rounds
    (13)
    $22.99 $13.99 Save $9.00 ($0.47 per round)
  8. PMC X-Tac 5.56 NATO Ammo 55gr FMJ-BT 200 Round Battle Pack
    PMC X-Tac 5.56 NATO Ammo 55gr FMJ-BT 200 Round Battle Pack
    (31)
    $143.99 $101.99 Save $42.00 ($0.51 per round)
  9. Federal Tactical Bonded 5.56 NATO Ammo 64gr SP 20 Rounds
    Federal Tactical Bonded 5.56 NATO Ammo 64gr SP 20 Rounds
    $29.99 $20.99 Save $9.00 ($1.05 per round)
  11. Federal Personal Defense 5.56 NATO Ammo 64gr SP 20 Rounds
    Federal Personal Defense 5.56 NATO Ammo 64gr SP 20 Rounds
    $29.99 $20.99 Save $9.00 ($1.05 per round)
  13. Hornady Frontier Cartridge 5.56 NATO Ammo 62gr FMJ
    Hornady Frontier Cartridge 5.56 NATO Ammo 62gr FMJ
    (4)
    $17.99 $116.99 $11.99 $84.99 Save $32.00 $0.57 $0.60 per round
  15. Hornady Superformance 5.56 NATO Ammo 55gr CX 20 Rounds
    Hornady Superformance 5.56 NATO Ammo 55gr CX 20 Rounds
    (1)
    $39.99 $25.99 Save $14.00 ($1.30 per round)
  20. Hornady Frontier Cartridge 5.56 NATO Ammo 55gr HP Match
    Hornady Frontier Cartridge 5.56 NATO Ammo 55gr HP Match
    (8)
    $50.99 $148.99 $25.99 $75.99 Save $73.00 $0.51 $0.52 per round
  21. Barnes VOR-TX Rifle 5.56 NATO Ammo 70gr TSX BT 20 Rounds
    Barnes VOR-TX Rifle 5.56 NATO Ammo 70gr TSX BT 20 Rounds
    Out of stock
    (8)
    $34.99 $29.99 Save $5.00 ($1.50 per round)
  22. Hornady Frontier Cartridge 5.56 NATO Ammo 68gr BTHP Match 20 Rounds
    Hornady Frontier Cartridge 5.56 NATO Ammo 68gr BTHP Match 20 Rounds
    Out of stock
    (17)
    $20.95 $12.99 Save $7.96 ($0.65 per round)
  23. Barnes VOR-TX Rifle 5.56 NATO Ammo 62gr TSX BT 20 Rounds
    Barnes VOR-TX Rifle 5.56 NATO Ammo 62gr TSX BT 20 Rounds
    Out of stock
    (5)
    $34.99 $28.99 Save $6.00 ($1.45 per round)
  24. Aguila 5.56 NATO Ammo 55gr FMJ
    Aguila 5.56 NATO Ammo 55gr FMJ
    Out of stock
    $15.99 $299.99 $15.99 $229.99 Save $70.00 $0.51 $0.53 per round
  25. Federal American Eagle 5.56 NATO Ammo 55gr FMJ 100 Rounds
    Federal American Eagle 5.56 NATO Ammo 55gr FMJ 100 Rounds
    Out of stock
    $81.99 $56.49 Save $25.50 ($0.56 per round)
  26. Winchester USA Green Tip 5.56 NATO Ammo 62gr FMJ 420 Rounds
    Winchester USA Green Tip 5.56 NATO Ammo 62gr FMJ 420 Rounds
    Out of stock
    $399.99 $364.99 Save $35.00 ($0.87 per round)
  27. Armscor Ammo 5.56 NATO Ammo 62gr FMJ 1,000 Rounds
    Armscor Ammo 5.56 NATO Ammo 62gr FMJ 1,000 Rounds
    Out of stock
    $849.99 ($0.85 per round)
  28. PPU Rangemaster 5.56 NATO Ammo 55gr FMJBT 20 Rounds
    PPU Rangemaster 5.56 NATO Ammo 55gr FMJBT 20 Rounds
    Out of stock
    $16.99 $13.99 Save $3.00 ($0.70 per round)
  29. Uzima Romanian 5.56 NATO Ammunition 55gr M193 FMJ 800 Rounds
    Uzima Romanian 5.56 NATO Ammunition 55gr M193 FMJ 800 Rounds
    Out of stock
    $599.99 $419.99 Save $180.00 ($0.52 per round)
  30. Winchester 5.56 NATO Ammo 62gr M855 Green Tip FMJ
    Winchester 5.56 NATO Ammo 62gr M855 Green Tip FMJ
    Out of stock
    (22)
    $16.99 $649.99 $12.99 $629.99 Save $46.00 $0.63 $0.69 per round
  31. Winchester Target & Practice 5.56 NATO Ammo 55gr M193 FMJ
    Winchester Target & Practice 5.56 NATO Ammo 55gr M193 FMJ
    Out of stock
    (5)
    $19.99 $129.99 $11.99 $86.99 Save $43.00 $0.58 $0.60 per round
  32. aguila-5-56x45mm-fmjbt-50-rounds.jpg
    Aguila 5.56 NATO Ammo 62gr FMJBT 50 Rounds
    Out of stock
    (1)
    $49.99 $27.99 Save $22.00 ($0.56 per round)
  33. winchester-5-56x45mm-nato-fmj-180-rounds.jpg
    Winchester USA 5.56 NATO Ammo 55gr FMJ 180 Rounds
    Out of stock
    $149.99 $84.99 Save $65.00 ($0.47 per round)
  34. Winchester USA 5.56 NATO Ammo 50gr JF 20 Rounds
    Winchester USA 5.56 NATO Ammo 50gr JF 20 Rounds
    Out of stock
    (1)
    $30.99 $18.99 Save $12.00 ($0.95 per round)
  35. PPU Mil-Spec 5.56 NATO Ammo 55gr FMJBT 20 Rounds
    PPU Mil-Spec 5.56 NATO Ammo 55gr FMJBT 20 Rounds
    Out of stock
    $19.99 $9.99 Save $10.00 ($0.50 per round)
  36. PPU Mil-Spec 5.56 NATO Ammo 55gr FMJBT 200 Rounds
    PPU Mil-Spec 5.56 NATO Ammo 55gr FMJBT 200 Rounds
    Out of stock
    $169.99 $88.99 Save $81.00 ($0.44 per round)
  37. Magtech Tactical 5.56 NATO Ammo 55gr FMJ 50 Rounds
    Magtech Tactical 5.56 NATO Ammo 55gr FMJ 50 Rounds
    Out of stock
    (16)
    $42.99 $24.49 Save $18.50 ($0.49 per round)
  38. Federal American Eagle 5.56 NATO Ammo 55gr FMJ 200 Rounds
    Federal American Eagle 5.56 NATO Ammo 55gr FMJ 200 Rounds
    Out of stock
    $163.99 $109.99 Save $54.00 ($0.55 per round)
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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.