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.223 Remington – Original AR-15 cartridge: .223 cartridges may function in a 5.56×45mm rifle, however 5.56×45mm cartridges may produce excessive pressure in a .223 Rem rifle. On the other hand, a .223 Wylde chamber is used on .223 Rem rifle barrels to allow them to safely fire either .223 Remington or 5.56×45mm NATO ammunition. [6]
Although that may have been true in the early 1960s when the two rounds were developed, recent testing has shown that rifles chambered in 5.56×45mm NATO can also fire .223 ammunition every bit as accurately as rifles chambered in .223 Remington, and the 5.56×45mm NATO chamber has the additional advantage of being able to safely fire both ...
If a 5.56×45mm NATO cartridge is loaded into a chamber intended to use .223 Remington, the bullet will be in contact with the rifling and the forcing cone is very tight. This generates a much higher pressure than .223 Remington chambers are designed for. [3] NATO chose a 178-mm (1-in-7) rifling twist rate for the 5.56×45mm NATO chambering.
First manufactured 7.62×39mm Soviet rounds in 2002, NATO-standard 5.56×45mm NATO and 7.62×51mm NATO rounds in 2005 (earning the NATO interchangeability rating in 2006), and sporting .223 Remington and .308 Winchester rounds in 2012. The headstamp has the caliber at 12 o'clock, manufacturer's code at 6 o'clock, 2-digit year of production at 3 ...
NATO (1980), 2nd gen. Current NATO service including M16 rifle, Steyr AUG, SA80, FAMAS, Heckler & Koch G36. Similar, but not interchangeable with .223 Rem. 5.6mm Gw Pat 90: 1987 Switzerland R 5.56×45mm 3168 1243 0.622 28.5 0.224 45mm Swiss military version of the 5.56×45mm NATO / 223 Remington. For SIG SG 550 and variants. 5.7×28mm: 1990 ...
The table below gives a list of firearms that can fire the 5.56×45mm NATO cartridge, first developed and used in the late 1970s for the M16 rifle, which to date, is the most widely produced weapon in this caliber. [1] Not all countries that use weapons chambered in this caliber are in NATO. This table is sortable for every column.
The M27 link, formally Link, Cartridge, Metallic Belt, 5.56mm, M27 is a metallic disintegrating link issued by the United States armed forces and among NATO and designed for use in belt-fed firearms. [1] It holds 5.56×45mm NATO ammunition.
This is also true for rifles such as Ruger's Mini-14 and most bolt-action rifles chambered for the .223 Remington cartridge. [1] The 6×45mm cartridge provides better down range performance than the .223 Remington or the 5.56 NATO cartridges. The cartridge is currently offered by Les Baer in an AR rifle.