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For projectiles in unpowered flight, its velocity is highest at leaving the muzzle and drops off steadily because of air resistance.Projectiles traveling less than the speed of sound (about 340 m/s (1,100 ft/s) in dry air at sea level) are subsonic, while those traveling faster are supersonic and thus can travel a substantial distance and even hit a target before a nearby observer hears the ...
These barrels are also available with rifling ranging from 356 mm (1-in-14") to 178 mm (1-in-7"). US makers are moving toward 5.56×45mm NATO and 178 mm (1-in-7"), which will ensure the least liability. [25] Those chambered for .223 Remington may not have a fast enough rifling to stabilize the longer 5.56×45mm NATO bullets which range up to 77 gr.
The SS190 uses a 2.7 mm (0.11 in) shorter projectile with a mass of 2.0 g (31 gr), which has, when fired from the P90, a muzzle velocity of roughly 716 m/s (2,350 ft/s; Mach 2.1). [31] The shorter length of the SS190 projectile allows it to be more conveniently used in the 5.7×28mm FN Five-seven pistol, which was also being developed at that time.
12.7×99mm Index of articles associated with the same name This set index article includes a list of related items that share the same name (or similar names).
The 7.62×45mm has a 2.79 mL (43.1 gr H 2 O) cartridge case capacity. The exterior shape of the case was designed to promote reliable case feeding and extraction in bolt-action and semi-automatic rifles and machine guns alike, under extreme conditions. 7.62×45mm maximum C.I.P. cartridge dimensions. All sizes in millimeters (mm).
The AOR is available in two variants; the M21-5 which uses the 5.56×45mm NATO round, and the M21-7 which uses the 7.62×51mm NATO. [4] [5] There are four sub-variants for the M21-5: M21-5 CQB Carbine with 10.5 inch long barrel; M21-5 Carbine with 14.5 inch barrel; M21-5 Standard with 16-inch barrel; M21-5 DMR Sniper rifle with 18-inch barrel
With a fast-firing gun using standard rifle ammunition, the US Army and US Air Force showed interest for use of the XM214 on aircraft, helicopters, and armored vehicles. The smaller and lighter Microgun could replace the Minigun on heavily armed gunship aircraft and attack helicopters, freeing up space for ammo, equipment, and even more guns.
Cartridge, caliber 7.62mm, NATO, frangible, M160: 108.5-grain (7.0 g) 7.62×51mm NATO frangible bullet, upon striking a target, disintegrates, leaving a mark at the point of impact. Cartridge, caliber 7.62mm, NATO, dummy, M172 : 7.62×51mm NATO cartridge is inert and is used to test the mechanism and metallic link belts of 7.62mm weapons.