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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. 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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  2. Barnes Bullets Precision 69 gr Open Tip Match Boat Tail 5.56 Ammo, 20/box - 30846

    Barnes Bullets Precision 69 gr Open Tip Match Boat Tail 5.56 Ammo, 20/box - 30846

    Rating:
    100%
    (2)
    Regular Price $35.99 Special Price $31.99 $1.60
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  3. Hornady Superformance 5.56x45mm Ammunition, 20 Rounds CX 55Gr - 812544

    Hornady Superformance 5.56x45mm Ammunition, 20 Rounds CX 55Gr - 812544

    Rating:
    60%
    (1)
    $34.99 $1.75
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  4. Barnes Bullets VOR-TX 70 gr TSX Boat Tail 5.56 Ammo, 20/box - 31191

    Barnes Bullets VOR-TX 70 gr TSX Boat Tail 5.56 Ammo, 20/box - 31191

    Rating:
    100%
    (5)
    Regular Price $39.99 Special Price $35.79 $1.79
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  5. 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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  6. 5.56mm Rifle

    American Eagle 5.56x45 62 gr FMJ 90 Rounds on Stripper Clips - XM855AF90

    Rating:
    97%
    (135)
    Out of Stock
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  7. 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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  8. 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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  9. 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

    Out of Stock
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  10. American Eagle 5.56mm 62gr FMJBT Ball Ammunition 20rds - XM855F

    American Eagle 5.56mm 62gr FMJBT Ball Ammunition 20rds - XM855F

    Out of Stock
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  11. 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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  12. Federal XM855 62 Grain FMJBT 5.56 Ammo, 475rds - BPXM855LC1BL

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

    Out of Stock
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  13. Winchester USA 5.56mm 55gr FMJ Ammunition, 180 Round Box - USA3131W

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

    Rating:
    90%
    (2)
    Out of Stock
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  14. Federal 5.56 Ammo

    Federal 5.56mm 55gr MCBT Ammunition 20rds - XM193F

    Rating:
    100%
    (2)
    Out of Stock
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  15. 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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  16. Prvi Partizan 5.56 Battle Pack

    PRVI Partizan 5.56mm M855 Ammunition 200rd Battle Pack - PPN5562BP

    Rating:
    90%
    (2)
    Out of Stock
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  17. X-Products M200 Mil-Spec 5.56 Blanks For Can Cannon 100pk - XAM-M200BLNK-100

    X-Products M200 Mil-Spec 5.56 Blanks For Can Cannon 100pk - XAM-M200BLNK-100

    Out of Stock
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  18. Armscor 5.56x45mm NATO Ammo 55 Grain FMJ 20rds - 50348

    Armscor 5.56x45mm NATO Ammo 55 Grain FMJ 20rds - 50348

    Rating:
    100%
    (1)
    Out of Stock
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  19. Scorpion Ammo 5.56x45 55gr FMJ 20rd - 556055FMJ-T20

    Scorpion Ammo 5.56x45 55gr FMJ 20rd - 556055FMJ-T20

    Rating:
    100%
    (3)
    Out of Stock
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  20. 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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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.