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Cartridge, Caliber 5.56 mm, Tracer, XM778: 5.56×45mm tracer cartridge mated with the XM777 Semi-Armor-Piercing cartridge. Cartridge, Caliber 5.56 mm, Ball, M855 [Green tip]: 5.56×45mm 62-grain FN SS109-equivalent ball cartridge with a steel penetrator tip over a lead core in a full copper jacket. It is designed to penetrate lightly armored ...
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.
M27 links connect up to 200 5.56×45m NATO rounds (4 × M855 ball : 1 M856 tracer) contained in an ammunition box used to feed a M249 light machine gun The M856 tracer cartridge (63.7-grain bullet) is used in the M16A2/3/4 , M4-series , and M249 weapons (among other 5.56mm NATO weapons).
The official name for .223 Remington in the US Army is cartridge 5.56x45mm ball, M193. 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]
The C8 has a 368 mm (14.5 in) A1 profile barrel like the Colt Model 653 M16A1 carbine, but with a 1 in 178 mm (7 in) rifling twist appropriate for adequately stabilizing the 5.56×45mm NATO C77 cartridge L109 ball and the C78 cartridge longer L110 tracer projectiles and the design improvements featured on C7 assault rifles. The C8 has a cyclic ...
The SG 550 is a selective-fire 5.56×45mm NATO assault rifle firing from a closed bolt. It has a gas-actuated piston-driven long-stroke operating system derived from the SIG SG 540 series of rifles, which uses burnt powder gases vented through a port in the barrel to power the weapon's moving parts. Once inside the gas cylinder, propellant ...
However, the design team decided to focus on the 5.56×45mm small caliber high-velocity cartridge, as it appeared the new round was gaining mainstream military approval. Eugene Stoner had previously worked with the cartridge when he designed the AR-15. The weapon system using the smaller cartridge was known as the Stoner 63. [5]
5.56×45mm NATO: Action: Gas-operated (rotating bolt) Rate of fire: 680 rounds/min: Muzzle velocity: 925 m/s (M21 A) 890 m/s (M21 S M193) 870 m/s (M21 S M855) Effective firing range: 450 m (490 yd) with iron sights 600 m (660 yd) with optics: Feed system: 30-round detachable box magazine: Sights: Adjustable iron sights, optional mount required ...