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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 XM193 5.56 NATO 55 Grain FMJ Ammo Can, 150 Rds - FR602

    Hornady Frontier XM193 5.56 NATO 55 Grain FMJ Ammo Can, 150 Rds - FR602

    Rating:
    95%
    (29)
    Regular Price $99.99 Special Price $79.99 $0.53
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  2. Norma Range & Training 5.56 55gr FMJ, 250rd - 701703514

    Norma Range & Training 5.56 55gr FMJ, 250rd - 701703514

    Rating:
    100%
    (1)
    Regular Price $169.99 Special Price $129.99 $0.52
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  3. PMC X-Tac 5.56 NATO 62gr Green Tip LAP 840rds w/ Bandoleer in M2A1 Ammo Can - 5.56(M855)(M/B)

    PMC X-Tac 5.56 NATO 62gr Green Tip LAP 840rds w/ Bandoleer in M2A1 Ammo Can - 5.56(M855)(M/B)

    Rating:
    96%
    (9)
    Regular Price $549.99 Special Price $419.99 $0.50
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  4. Winchester USA 5.56 Bulk Ammo 55 Gr FMJ, 500rds Bulk Pack

    Winchester USA 5.56 Bulk Ammo 55 Gr FMJ, 500rds Bulk Pack

    Rating:
    95%
    (409)
    Regular Price $349.99 Special Price $249.99 $0.50
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  5. 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%
    (372)
    Regular Price $169.99 Special Price $119.99 $0.60
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  6. Winchester M855 62 gr FMJ 5.56x45mm Ammunition 1000 Rounds

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

    Rating:
    94%
    (56)
    Regular Price $649.99 Special Price $529.99 $0.53
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  7. 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:
    96%
    (136)
    Regular Price $119.99 Special Price $79.99 $0.53
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  8. Winchester 5.56 Bulk Ammo 55 gr FMJ 200rds

    Winchester USA 5.56 Bulk Ammo 55 Grain FMJ 200rds - WM193200

    Rating:
    96%
    (241)
    Regular Price $149.99 Special Price $119.99 $0.60
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  9. Winchester 5.56 Bulk Ammo 55 Gr FMJ 1000rds

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

    Rating:
    95%
    (41)
    Regular Price $649.99 Special Price $519.99 $0.52
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  10. 5.56 Rifle Ammo

    Winchester 5.56 Ammo 55 Gr FMJ 150rds - WM193150

    Rating:
    96%
    (264)
    Regular Price $99.99 Special Price $79.99 $0.53
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  11. Federal American Eagle 5.56 55gr FMJ-BT Ammo, 100rds - AE193C

    Federal American Eagle 5.56 55gr FMJ-BT Ammo, 100rds - AE193C

    Regular Price $73.99 Special Price $66.99 $0.67
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  12. Federal American Eagle 55gr 5.56x45 FMJ 20rd - FEDEAE193

    Federal American Eagle 55gr 5.56x45 FMJ 20rd - FEDEAE193

    Rating:
    100%
    (7)
    $12.99 $0.65
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  13. Winchester Ammunition USA 5.56x45mm 55 gr FMJ 100rds

    Winchester Ammunition USA 5.56x45mm 55 gr FMJ 100rds

    Rating:
    100%
    (12)
    Regular Price $71.99 Special Price $63.99 $0.64
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  14. PPU USA 5.56x45mm 20rds

    PPU USA 5.56x45mm 20rds

    Regular Price $1,557.99 Special Price $1,402.99 $70.15
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  15. Global Ordnance 5.56x45mm 55 gr FMJ 20rds

    Global Ordnance 5.56x45mm 55 gr FMJ 20rds

    Rating:
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    (1)
    Regular Price $13.99 Special Price $12.19 $0.61
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  16. Sterling 5.56x45mm 55 gr FMJ 30rds

    Sterling 5.56x45mm 55 gr FMJ 30rds

    Rating:
    96%
    (21)
    Regular Price $20.99 Special Price $18.99 $0.63
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  17. Fort Scott Munitions Tumble Upon Impact 5.56 62 gr Ammo SBS - 20rds - 556062SBV1

    Fort Scott Munitions Tumble Upon Impact 5.56 62 gr Ammo SBS - 20rds - 556062SBV1

    Regular Price $36.99 Special Price $26.99 $1.35
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  18. Fort Scott Munitions Tumble Upon Impact 5.56 62gr SCS Ammo, 20rds - 556062SCV

    Fort Scott Munitions Tumble Upon Impact 5.56 62gr SCS Ammo, 20rds - 556062SCV

    Regular Price $29.99 Special Price $26.99 $1.35
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  19. Fort Scott Munitions Tumble Upon Impact 5.56 55 gr Ammo SCS - 20rds - 556055SCV

    Fort Scott Munitions Tumble Upon Impact 5.56 55 gr Ammo SCS - 20rds - 556055SCV

    Regular Price $29.99 Special Price $26.99 $1.35
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  20. 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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  21. AAC 5.56 Ammo 55 Grain FMJ 20rd Box - AAC556FMJ1-20

    AAC 5.56 Ammo 55 Grain FMJ 20rd Box - AAC556FMJ1-20

    Rating:
    98%
    (632)
    $10.99 $0.55
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  22. Winchester 55 gr FMJ 5.56x45 M193 Ammunition 20 Rounds

    Winchester 55 gr FMJ 5.56x45 M193 Ammunition 20 Rounds - WM193K

    Rating:
    97%
    (91)
    $11.99 $0.60
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  23. PPU Rangemaster 55 gr FMJBT 5.56x45 Ammunition 20 Rounds

    PPU Rangemaster 55 gr FMJBT 5.56x45 Ammunition 20 Rounds - PPRM5561

    Rating:
    90%
    (4)
    Regular Price $13.99 Special Price $11.99 $0.60
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  24. 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:
    94%
    (49)
    $12.99 $0.65
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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.