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5.56x45 Ammo (AR-15)

5.56x45 Ammo (AR-15)

5.56 ammo is extremely popular among American AR-15 shooters. If your rifle is stamped with "5.56" or "5.56x45" you've got the right caliber. However, if you have a rifle with "223" or "223 Rem" on it, you'll want to browse our slightly lower pressure 223 ammo line-up to avoid potential problems.

If you have a 1:8 or 1:9 twist rate barrel, you should have good results with any bullet weight from about 45 grain to 77 grain, including the popular mil-spec M193 and M855 loads. 1:12 shooters will want to go with lighter bullets. 1:7 or 1:6 shooters will want to look for heavier bullets.

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5.56x45mm Ammo Quick Facts

The 5.56x45mm ammunition is a higher pressure version of the civilian cartridge and generally cannot be used in bolt action rifles.
5.56x45mm nato ammo has been the standard round of the U.S. Military since 1963.
To find bulk 5.56x45mm nato ammo, use the "Sort By" toggle at the top of the page.
5.56x45 ammo is available from 55 to 77 grain bullet weights.

5.56x45 Ammo (AR-15)

5.56x45 - 55 Grain HP Match - Hornady Frontier - 20 Rounds

5.56x45 - 62 Grain FMJ M855 - Winchester - 20 Rounds

5.56x45 - 55 Grain FMJ M193 - Igman - 20 Rounds

5.56x45 - 68 Grain BTHP Match - Hornady Frontier - 20 Rounds

5.56x45 - 62 Grain FMJ - Hornady Frontier - 20 Rounds

5.56x45 - 75 Grain BTHP Match - Hornady Frontier - 20 Rounds

5.56x45 - 62 Grain FMJ - Hornady BLACK - 200 Rounds

5.56x45 - 62 Grain FMJ - Hornady BLACK - 20 Rounds

5.56x45 - 77 Grain OTM - Armscor Subsonic - 200 Rounds

5.56x45 - 77 Grain OTM - Armscor Subsonic - 20 Rounds

5.56x45 - 75 gr HPBT Superformance Match - Hornady - 200 Rounds

5.56x45 - 75 Grain InterLock HD SBR - Hornady BLACK - 200 Rounds

5.56x45 - 75 Grain Interlock HD SBR - Hornady BLACK - 20 Rounds

5.56x45 - 77 Grain HPBT MatchKing w/Cannelure - HSM Match - 50 Rounds

5.56x45 - 69 Grain Open Tip Match - Black Hills - 50 Rounds

5.56x45 - 69 Grain Open Tip Match - Black Hills - 500 Rounds

5.56x45 - 77 Grain OTM - Black Hills - 500 Rounds

5.56x45mm - 77 Grain TMK Sierra MatchKing - Black Hills - 50 Rounds

5.56x45 - 77 Grain OTM - Black Hills - 50 Rounds

5.56x45 - 69 Grain TMK - Black Hills - 50 Rounds

5.56x45 - 55 Grain CX - Hornady Superformance - 20 Rounds

5.56x45 - 77 Grain OTM Mk 262 MOD 1-C - Black Hills - 460 Rounds in Ammo Can

5.56x45mm - 69 Grain OTM BT - Barnes Precision Match - 20 Rounds

5.56x45 - 50 Grain Barnes TSX HP - Black Hills Ammunition - 500 Rounds

5.56x45mm - 62 Grain TSX Hollow Point - Black Hills Ammo - 500 Rounds

5.56 NATO - 62 Grain Barnes TSX HP - Black Hills Ammunition - 50 Rounds

5.56x45 - 62 Grain Dual Performance - Black Hills - 500 Rounds

5.56x45 - 50 Grain Barnes TSX HP - Black Hills Ammunition - 50 Rounds

5.56x45 - 62 Grain Dual Performance - Black Hills - 50 Rounds

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