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Tactical. AR-15 Basics: .223 vs. 5.56×45 NATO. Patrick Sweeney. - January 12, 2017. 1. At GunDigest, we independently review products. However, we may earn a commission when you purchase through links on our site. Learn More. If it is newer than M855 (the mid-1980s) and it is military, you can be sure it is 5.56 and should be treated accordingly.
The NATO round has a muzzle velocity of 930 m/s and an energy of 1.700 J. At 400 meters these figures as reduced to 575 m/s and 650 J. At ranges up to 125 m the NATO round is certain to fragment and is considered potentially more lethal than the larger and heavier 7.62x39mm Soviet round.
Nov 28, 2014 · NATO agreed in 1977 to accept the 5.56×45 round as a NATO standard, with some minor variations in loading and bullet design. The acceptance of the M16 and its 5.56×45 cartridge was not without controversy. Initially, the rifle was criticized frequently after its introduction to the battlefield in RVN.
Jul 20, 2022 · The main differences are that 5.56×45 mm NATO operates at a higher chamber pressure (about 60,000 PSI versus 55,000 PSI on the .223 Rem.) and the 5.56’s chamber is slightly larger than that of the .223 Rem. Also, the throat or leade is longer in the 5.56×45 mm chamber.
The M4 carbine (officially Carbine, Caliber 5.56 mm, M4) is a 5.56×45mm NATO, gas-operated, [b] magazine -fed carbine developed in the United States during the 1980s. It is a shortened version of the M16A2 assault rifle .
The 5.56×45mm NATO round, pronounced " five-five-six ", is an intermediate cartridge and the main bullet type used by guns made for NATO militaries. It was first used in the Vietnam War as the main bullet used by the US military.
Apr 13, 2021 · AR-10 and AR-15. Resource. The History of the AR-15 and 5.56×45 NATO Cartridge is a long one. In this article, we take a look at the development of the AR15 and the 5.56 cartridge.
