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The FN 5.7×28mm (designated as the 5.7×28 by the C.I.P. [7] and FN 5.7×28mm NATO [9]) is a small-caliber, high-velocity, smokeless-powder, rebated, non-tapered, bottleneck, centerfire cartridge designed for pistols and personal defense weapons (PDW) uses, manufactured by FN Herstal. [10] It is similar in length to the .22 WMR and .22 Hornet ...
FN Herstal was the first small arms manufacturer to respond to NATO's requirement; FN started by developing a shoulder-fired personal defense weapon, the FN P90, along with a small caliber, high velocity 5.7×28mm cartridge type. [1] The original 5.7×28mm cartridge, called the SS90, went into production with the P90 in 1990. [24]
His cartridge was designed to fit the M1 Carbine and its magazines by starting from the basic form of the .30 Carbine ammunition, keeping the same overall length and case dimensions, necked down to .224 (5.7mm) caliber. [2] [3] Originally designed with a 1-in-14 twist barrel, the 40 grain .22 Hornet bullet was the standard
The initial testing was done in 2008 and tested the velocity of 13 common handgun cartridges as it related to firearm barrel length. In 2009 an additional three calibers were tested and in 2010 and 2011 more calibers were added. Also in 2011 testing was carried out to study the "cylinder gap effect" on the velocity of ammunition shot from ...
Test barrel length: 22.75" rifle (higher velocity) and 5.0" pistol (lower velocity) The .22 TCM (Tuason, Craig, Micromagnum) is a proprietary bottlenecked rimless cartridge derived from a 5.56×45mm NATO (.223 Remington) parent case.
So, the muzzle velocity of a 2-inch (51 mm) barrel is less than that of a 4-inch (100 mm) barrel, which is less than that of a 6-inch (150 mm) barrel. Large naval guns will have high length-to-diameter ratios, ranging between 38:1 to 50:1. This length ratio maximizes the projectile velocity.
The frame is made out of polymer, [6] the slide and barrel are made out of 416 stainless steel [7] and the magazine is made out of black oxide alloy steel. [8] PSA offers the barrel finished in several colors, it can be bought threaded and non-threaded. [9] The standard magazine holds 23 rounds, 3 more than the similar size and caliber FN Five ...
[7] [8] The barrel and moving parts are made from steel, with a polymer frame and lower receiver to reduce weight. [9] [10] The P50 has an unusually long barrel for a handgun, helping to improve its muzzle velocity. [11] At nine inches, it is over double the length of the barrel of the FN Five-seven, and only one inch less than the P90's barrel ...