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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. Hornady Frontier 5.56 Ammo

    Hornady Frontier 5.56 NATO Ammo 55 Grain FMJ, 20rds - FR200

    Rating:
    97%
    (79)
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  2. Hornady T2 Frontier 5.56 NATO 75 Grain BTHP Match Ammunition, 20rds

    Hornady T2 Frontier 5.56 NATO 75 Grain BTHP Match Ammunition, 20rds - FR320

    Rating:
    97%
    (40)
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  3. Winchester USA 5.56mm 55gr FMJ Ammunition, 180 Round Box - USA3131W

    Winchester USA 5.56mm 55gr FMJ Ammunition, 180 Round Box - USA3131W

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    90%
    (2)
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  4. 5.56 Rifle Ammo

    Winchester 5.56mm 77gr BTHP Match Ammunition, 20 Round Box - S556M

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  5. PMC X-TAC 5.56 62 gr Ammo, 120/Battle Pack - 5.56K-BP

    PMC X-TAC 5.56 62 gr Ammo, 120/Battle Pack - 5.56K-BP

    Rating:
    96%
    (94)
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  6. PMC X-Tac 5.56 Ammo 55 Grain FMJ 200rds Sealed Battle Pack - 5.56X-BP

    PMC X-Tac 5.56 Ammo 55 Grain FMJ 200rds Sealed Battle Pack - 5.56X-BP

    Rating:
    96%
    (101)
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  7. Federal 5.56 NATO 77gr OTM Ammunition 20rds - FC262

    Federal 5.56 NATO 77gr OTM Ammunition 20rds - FC262

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  8. Aguila 5.56mm 62gr FMJBT Ammunition 50rds - 1E556110

    Aguila 5.56mm 62gr FMJBT Ammunition 50rds - 1E556110

    Rating:
    93%
    (3)
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  9. Noveske 5.56mm 60gr Ballistic Glow Tip Ammunition 20rds - 52207

    Noveske 5.56mm 60gr Ballistic Glow Tip Ammunition 20rds - 52207

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  10. Magtech 5.56x45mm Ammo

    Magtech 5.56x45mm 55gr FMJ M193 50 Rounds Ammunition - 556A

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  11. American Eagle 5.56 62 grain m855 ammo 150 rounds

    American Eagle 5.56mm 62gr M855 Ammunition 150rds - XM855BK150

    Rating:
    98%
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  12. Winchester 5.56 Ammo 50 Grain Jacketed Frangible, 20 rds/box - USA556JF

    Winchester 5.56 Ammo 50 Grain Jacketed Frangible, 20 rds/box - USA556JF

    Rating:
    92%
    (10)
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  13. 5.56 Rifle Rounds

    Hornady 5.56 NATO 55gr GMX Superformance 20rds - 81254

    Rating:
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  14. Winchester 5.56mm 62gr NATO Ammunition FMJ 20rds - Q3269

    Winchester 5.56mm 62gr NATO Ammunition FMJ 20rds - Q3269

    Rating:
    96%
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  15. Federal 5.56mm 62gr OTM MK318 MOD 0 Ammunition 20rds - T556TNB1

    Federal 5.56mm 62gr OTM MK318 MOD 0 Ammunition 20rds - T556TNB1

    Rating:
    92%
    (5)
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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.