5.56x45mm – 62 Grain FMJ M855 – PMC (5.56K) – 20 Rounds

A single 20 round box of M855 is a handy way to test a new rifle’s accuracy with 62 grain ammo or top off a range bag. This listing is PMC X-Tac 5.56x45mm NATO 62 grain M855 green tip ammo, MPN 5.56K, sold as one 20 round box.

PMC rates this load at 3,100 fps with 1,323 ft-lbs of muzzle energy. The M855 bullet has a lead core with a steel penetrator in the nose, identified by its green tip, and matches the US military 62 grain standard. The heavier bullet holds velocity and resists wind better than 55 grain M193, and it stabilizes best in 1:7, 1:8, and 1:9 twist barrels. Shooters use M855 to match military ballistics, to zero rifles that will be fed M855, and to practice on steel at distance.

This ammunition fits rifles chambered in 5.56x45mm NATO or 223 Wylde, including AR-15 rifles and carbines, the FN SCAR 16, Sig MCX, IWI Tavor, HK416 and MR556, and Springfield Saint. A common question is whether M855 is allowed at indoor ranges. Many indoor ranges and some outdoor ranges prohibit steel penetrator ammunition because it can damage targets and backstops, so check your range rules first. Another common question is whether M855 will shoot accurately in an older 1:12 twist barrel. Many 1:12 barrels struggle to stabilize 62 grain bullets, so 55 grain ammunition is a better choice there. Do not fire 5.56 NATO in a rifle marked only 223 Remington.

PMC 5.56K is new production ammunition, not reloads, loaded in South Korea. Each round uses a reloadable brass case with a boxer primer and is non-corrosive. This listing ships as one box of 20 rounds of 5.56 NATO 62 grain M855. For bulk buyers, the same load is also available in larger packs, including Battle Packs and an 840 round ammo can.