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5.56 Ammo

Stock up on 5.56 ammo from leading brands for your AR-15 rifle and other rifles. Whether you're training, target shooting, or preparing for defense, we offer 5.56 bulk ammo options at great prices. Enjoy fast shipping and reliable performance for all ammo sold at PSA.

55 Grain 5.56

55 Grain 5.56
62 Grain 5.56

62 Grain 5.56
77 Grain 5.56

77 Grain 5.56
.223

.223
Bulk 5.56

Bulk 5.56
AR-15 Magazines

AR-15 Magazines
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  1. American Eagle 5.56x45 55gr FMJBT Ammunition 1000rds Loose Pack For Sale

    American Eagle 5.56 Bulk Ammo 55 Gr FMJBT 1000rds - XM193BKX

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  2. Ammo Inc. Signature 5.56 Ammo 62 Grain SS109 FMJ 200rds

    Ammo Inc. Signature 5.56 Ammo 62 Grain SS109 FMJ 200rds

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    (95)
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  3. Federal 55 gr FMJ 5.56x45 Ammo 400 Round Ammo Can XM193

    Federal 5.56 Ammo 55 Grain FMJ 400 Round Ammo Can - XM193ML1X

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    (27)
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  4. Federal Ammunition XM193 5.56 NATO 1,000rd Bulk Pack For Sale

    Federal Ammunition XM193 5.56 NATO 1,000rd Bulk Pack - XM193BKF

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  5. Ammo Inc Signature 5.56x54mm 55gr FMJ 200rd Range Pack

    Ammo Inc Signature 5.56x54mm 55gr FMJ 200rd Range Pack - 556055FMJ-A200

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    (6)
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  6. Federal American Eagle 55 gr FMJ-BT 5.56x45 Ammunition 420 Rounds

    Federal American Eagle 55 gr FMJ-BT 5.56x45 Ammunition 420 Rounds - XM193BK420 AC1X

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    (3)
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  7. Federal American Eagle Training 55 gr FMJ 5.56x45 Ammunition 100 Rounds

    Federal American Eagle Training 55 gr FMJ 5.56x45 Ammunition 100 Rounds - XM193BLX

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  8. Federal American Eagle 55 gr FMJ-BT 5.56x45 Ammunition 20 Rounds

    Federal American Eagle 55 gr FMJ-BT 5.56x45 Ammunition 20 Rounds - XM193X

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  9. Winchester M855 62 gr FMJ Green Tip 5.56x45mm Ammunition 200 Rounds

    Winchester M855 5.56 Bulk Ammo 62 Gr FMJ Green Tip 200rds - WM855200

    Rating:
    96%
    (354)
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  10. Winchester M855 62 gr FMJ 5.56x45mm Ammunition 1000 Rounds

    Winchester M855 5.56 Bulk Ammo 62 Grain FMJ 1000rds - WM8551000

    Rating:
    94%
    (56)
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  11. Winchester M855 62 gr FMJ 5.56x45mm Ammunition 500 Rounds

    Winchester M855 5.56 Bulk Ammo 62 Gr FMJ Green Tip 500rds - WM855500

    Rating:
    95%
    (44)
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  12. Winchester M855 62 gr Green Tip FMJ 5.56x45mm Ammunition 150 Rounds

    Winchester M855 62 gr Green Tip FMJ 5.56x45mm Ammunition 150 Rounds - WM855150

    Rating:
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    (109)
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  13. Federal XM855 62 Grain FMJBT 5.56 Ammo, 475rds - BPXM855LC1BL

    Federal XM855 62 Grain FMJBT 5.56 Ammo, 475rds - BPXM855LC1BL

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  14. Winchester M855 62 gr FMJ Green Tip 5.56x45mm Ammunition 20 Rounds - USA855K

    Winchester M855 62 gr FMJ Green Tip 5.56x45mm Ammunition 20 Rounds - USA855K

    Rating:
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  15. GECO 5.56 NATO 55 Grain FMJ 50rd White Box

    GECO 5.56 NATO 55 Grain FMJ 50rd White Box - 455650050

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  16. Sellier & Bellot Tactical 5.56 55gr FMJ Ammunition, 20rds - SB556A

    Sellier & Bellot Tactical 5.56 55gr FMJ Ammunition, 20rds - SB556A

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  17. Federal American Eagle 5.56 62gr FMJ-BT 420rd Loose M2A1 Ammo Can - XM855BK420 AC1

    Federal American Eagle 5.56 62gr FMJ-BT 420rd Loose M2A1 Ammo Can - XM855BK420 AC1

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  18. Hornady Frontier 5.56 55gr FMJ 500 Rounds - FR204

    Hornady Frontier 5.56 55gr FMJ 500 Rounds - FR204

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  19. Winchester 5.56 Bulk Ammo 55 Gr FMJ 1000rds

    Winchester 5.56 Bulk Ammo 55 Gr FMJ, 1000rds - WM1931000

    Rating:
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  20. Geco Target 55 gr Full Metal Jacket 5.56 Ammo, 50/box - 278140050

    Geco Target 55 gr Full Metal Jacket 5.56 Ammo, 50/box - 278140050

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  21. Hornady Superformance Match 73 gr ELD-Match 5.56 Ammo, 20/box - 81268

    Hornady Superformance Match 73 gr ELD-Match 5.56 Ammo, 20/box - 81268

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  22. Hornady Frontier 62 gr Full Metal Jacket 5.56 Ammo, 150/box - FR2615

    Hornady Frontier 62 gr Full Metal Jacket 5.56 Ammo, 150/box - FR2615

    Rating:
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  23. Hornady Frontier 55 gr Full Metal Jacket 5.56 Ammo, 150/box - FR2015

    Hornady Frontier 55 gr Full Metal Jacket 5.56 Ammo, 150/box - FR2015

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  24. Hornady Frontier 5.56 Ammo 62 gr FMJ, 20rds - FR260

    Hornady Frontier 5.56 Ammo 62 gr FMJ, 20rds - FR260

    Rating:
    98%
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Can't find your caliber?

Learn More About 5.56 Ammo

History of 5.56mm Ammo

Developed in the late 1950s by the U.S. Army, 5.56mm ammo was designed to be lighter and more versatile than previous .30 caliber rounds. Officially adopted by NATO in 1980, it became the standard military cartridge, known for its high velocity and low recoil. Originally paired with the M16 rifle, 5.56mm ammo remains popular for military, hunting, sport shooting, and self-defense.

Practical Uses for 5.56mm Ammo

5.56mm cartridges are ideal for target shooting, home defense, and varmint hunting. Their lightweight design allows for quick follow-up shots and mild recoil, making them accessible for all skill levels. The 5.56mm is especially popular in AR-15 platforms for its speed and effective fragmentation, minimizing over-penetration in home defense scenarios.

5.56mm Ammo Accuracy

Known for its accuracy, 5.56mm ammo offers a flat trajectory and high velocity (2,800–3,100 fps), making it effective at medium to long ranges. The boat-tail bullet design enhances aerodynamics, while various bullet weights (55–77 grains) allow shooters to tailor their ammo for short or long-range precision.

5.56mm Ballistics

The 5.56mm round delivers excellent ballistic performance, with high velocity for minimal bullet drop and effective stopping power. It often fragments on impact, causing significant internal damage, and can penetrate light barriers. While its power decreases beyond 500 yards, it remains a versatile choice for many shooting applications.

Affordability of 5.56mm Ammo

5.56mm ammo is cost-effective due to mass production for military and civilian use. It is more affordable than larger cartridges like .308 Winchester, making it ideal for frequent practice. Surplus military rounds are also widely available, offering even greater value for budget-conscious shooters.

Why Buy 5.56 Ammo from Palmetto State Armory?

Palmetto State Armory provides high-quality 5.56 ammo at competitive prices. With a wide selection and fast shipping, you can count on us for reliable ammunition for all your shooting needs.