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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 Black 75 gr InterLock HD 5.56 Ammo

    Hornady Black 75 gr InterLock HD 5.56 Ammo, 20rds/box – 81296

    Rating:
    97%
    (14)
    $26.99 $1.35
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  2. 5.56 Rifle Rounds Hornady Black 5.56 Nato 62gr FMJ Centerfire Rifle Ammunition

    Hornady Black 5.56 Ammo 62 Gr FMJ, 20rds - 81263

    Rating:
    100%
    (11)
    $19.99 $1.00
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  3. 5.56 Rifle Ammo

    Hornady Superformance Match 5.56 Ammo 75 Gr BTHP 20rds - 81264

    Rating:
    98%
    (8)
    $30.99 $1.55
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  4. PMC X-Tac 5.56 Ammo

    PMC X-TAC 5.56 NATO Ammo 55 Grain FMJBT, 20 rds/box – 556X

    Rating:
    98%
    (627)
    Regular Price $14.99 Special Price $9.99 $0.50
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  5. PMC X-Tac 5.56 Ammo

    PMC X-Tac 5.56 Ammo 62 Gr LAP 20rds - 556k

    Rating:
    98%
    (719)
    Regular Price $12.99 Special Price $11.59 $0.58
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  6. Winchester Lake City 5.56x45mm 62 gr FMJ 20rds

    Winchester Lake City 5.56x45mm 62 gr FMJ 20rds

    Rating:
    100%
    (5)
    Out of Stock
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  7. Winchester USA 5.56x45mm 55 gr FMJ 420rds

    Winchester USA 5.56x45mm 55 gr FMJ 420rds

    Out of Stock
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  8. Winchester Ammo 5.56mm M193 55gr FMJ 500rd - SGM193500

    Winchester Ammo 5.56mm M193 55gr FMJ 500rd - SGM193500

    Rating:
    97%
    (98)
    Out of Stock
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  9. Winchester USA Valor 62 gr FMJ M855 5.56x45 Ammunition, 125 Rounds - USA855125

    Winchester USA Valor 62 gr FMJ M855 5.56x45 Ammunition, 125 Rounds - USA855125

    Rating:
    99%
    (33)
    Out of Stock
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  10. Federal American Eagle 62 GR FMJBT 5.56 Ammo

    Federal American Eagle 62 GR FMJBT 5.56 Ammo, 20rds/box - XM855FL

    Rating:
    98%
    (23)
    Out of Stock
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  11. Federal American Eagle 5.56x45mm NATO 62gr FMJ 820rd Ammo Can - ZSAM855MOI

    Federal American Eagle 5.56x45mm NATO 62gr FMJ 820rd Ammo Can - ZSAM855MOI

    Rating:
    94%
    (65)
    Out of Stock
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  12. Prvi Partizan 5.56x45 M855 62 gr FMJBT 20 Rounds Ammunition - PPN5562

    Prvi Partizan 5.56x45 M855 62 gr FMJBT 20 Rounds Ammunition - PPN5562

    Out of Stock
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  13. Federal Independence 5.56x45mm 62gr FMJ Ammunition, 20 Rounds

    Federal Independence 5.56x45mm 62gr FMJ Ammunition, 20 Rounds – XM855I

    Rating:
    97%
    (72)
    Out of Stock
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  14. American Eagle 5.56mm 62gr FMJ Steel Core Ammunition, 1000 Rounds

    American Eagle 5.56mm 62gr FMJ Steel Core Ammunition, 1000 Rounds - XM855CSF

    Rating:
    96%
    (395)
    Out of Stock
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  15. MAGTECH/CBC 5.56mm XM193 55gr FMJ 1000 Round Ammo Can - 556MIL

    MAGTECH/CBC 5.56mm XM193 55gr FMJ 1000 Round Ammo Can - 556MIL

    Rating:
    100%
    (2)
    Out of Stock
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  16. Prvi Partizan 5.56 55GR Ammo

    PRVI Partizan 5.56mm M193 55gr FMJBT Ammunition 20 Round Box - PPN5561

    Rating:
    97%
    (6)
    Out of Stock
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  17. 5.56 Rifle Ammo american eagle 5.56mm 55 grain FMJ ammo a150 rounds

    American Eagle 5.56mm 55gr FMJ Ammunition 150rds - XM193BK150

    Rating:
    97%
    (567)
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  18. Black Hills 5.56mm 70gr GMX Ammunition 50rds - D556N3

    Black Hills 5.56mm 70gr GMX Ammunition 50rds - D556N3

    Out of Stock
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  19. Black Hills 5.56mm 69gr OTM (Open Tip Match) Ammunition 50rds - D556N12

    Black Hills 5.56mm 69gr OTM (Open Tip Match) Ammunition 50rds - D556N12

    Out of Stock
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  20. PRVI Partizan 5.56x45mm M855 62gr Ammunition, 1000 Round Case - PP5.6

    PRVI Partizan 5.56x45mm M855 62gr Ammunition, 1000 Round Case - PP5.6

    Rating:
    80%
    (2)
    Out of Stock
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  21. American Eagle 5.56 Ammo

    American Eagle Rifle 5.56x45mm FMJ-BT 90 Rounds Ammunition on Stripper Clips - XM193AF90

    Rating:
    97%
    (133)
    Out of Stock
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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.