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5.56x45mm is one of the most popular calibers at BulkAmmo.com. While there are a number of reliable rounds, the most popular manufacturers of the NATO round tend to be produced by Lake City, Federal American Eagle, and PMC (Precision Made Cartridge).

Find 5.56 ammunition online at Guns.com - in stock and ready to ship. Shop deals on AR-15 ammo. 5.56x45mm is a popular caliber for AR-15 rifles.

Order 5.56 ammo direct from Palmetto State Armory. We offer ammo from the best brands at the best prices for your AR-15. Save even more by ordering 556 bulk ammo. Prvi Partizan 5.56x45mm 55gr (FMJBT) Ammo, 1000 rds. - PPRM556B. ... Can't find your caliber?

Online shopping from a great selection of discounted 5.56 mm NATO Rifle Ammunition at Sportsman's Outdoor Superstore.

The 5.56×45mm NATO (official NATO nomenclature 5.56 NATO, commonly pronounced "five-five-six") is a rimless bottlenecked centerfire intermediate cartridge family developed in the late 1970s in Belgium by FN Herstal. [5] It consists of the SS109, L110, and SS111 cartridges.

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 for sale that's in stock at Lucky Gunner Ammo - today!

Find your 5.56x45 NATO Rifle Ammunition for your AR Platform including target, competition, plinking, or home self-defense at Brownells.

Shop for 5.56x45mm NATO Ammunition at Cabela’s, your trusted source for quality outdoor sporting goods. With our low price guarantee, we strive to offer the lowest everyday prices on the best brands and latest gear.