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5.56 mm (5.56×45mm NATO) Designed to chamber NATO ammunition: 430.0 / (62,366) 537.5 / (77,958) Pressure recorded in NATO design EPVAT Barrel with Kistler 6215 Transducer, [9] [10] HPI GP6 Transducer [11] or by equipment to Commission internationale permanente pour l’épreuve des armes à feu portatives (C.I.P.) requirements 7.62 mm (7.62× ...
NATO defines 5.56mm, 7.62mm, 9mm, and 12.7mm using the NATO EPVAT test methods, which includes pressure testing. Unlike the civilian testing methods NATO EPVAT testing procedures for the "NATO rifle chamberings" require the pressure sensor or transducer to be mounted ahead of the case mouth.
The chamber is opened under high pressure, thus the chamber received a series of flutes in order to increase extraction reliability and prevent sticking of the spent casing to the chamber walls. The G3 roller-delayed blowback mechanism designed around 7.62×51mm NATO ammunition was downsized and revised for reliably using 5.56×45mm NATO ...
These have been replaced to a considerable extent in the light machine gun role by 5.56×45mm NATO weapons, such as the widespread use of the M249 SAW, but the 7.62×51mm NATO fully powered cartridge is still the standard chambering for the M134 Minigun and GPMGs such as the M60E4, FN MAG/M240, HK21, MG3, AA-52, Vektor SS-77, UKM-2000 and MG5 ...
The parent case (5.56×45mm NATO) was trimmed down to 1.560" and re-sized with a 7.62×40mm WT sizing die. [3] The overall case length after the shortening and re-sizing is 1.565". The cartridge was designed to use .308" diameter bullets in weights of 110 to 150 grains, with a standard twist rate of 1-12". [1]
.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]
The LMG (now named, LAMG) is chambered in 5.56×45mm NATO cartridge and the LAMG (now named, AMG) is chambered in 7.62×51mm NATO. Many features on the platform are unlike that of any other Light Machine Gun currently available. The LAMG and AMG weigh 11.4 lb (5.1 kg) and 13.9 lb (6.3 kg) respectively.
NATO cartridge may refer to: Small arms 9×19mm NATO (STANAG 4090) 4.6×30mm NATO (STANAG 4820) 5.7×28mm NATO (STANAG 4509) 5.56×45mm NATO (STANAG 4172) 7.62×51mm NATO (STANAG 2310) 12.7×99mm NATO (STANAG 4383) 40 mm grenade (×46 mm LV, ×51 mm MV, ×53 mm HV) Autocannons 20×102mm (STANAG 3585), 20 mm caliber; 25×137mm (STANAG 4173), 25 ...