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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 ...
The Ruger-5.7 is a semi-automatic pistol introduced in December 2019 by Sturm, Ruger & Co. [3] It is the first traditionally-styled semi-automatic pistol to be chambered for the 5.7×28mm cartridge since the introduction of the Excel Arms MP-57 in 2012.
The 5.7 Rock is a semi-automatic pistol developed, manufactured, and sold by Palmetto State Armory. [2] It is chambered for the FN 5.7×28mm cartridge and is characterized by its generally low recoil. It is a competitor to the Five-seven, the Ruger-57, the M&P 5.7 and the TİSAŞ PX-5.7. [4] [5]
The pistol is named for the 5.7×28mm cartridge's bullet diameter, and the trademark's capitalization style is intended to emphasize the manufacturer's initials—FN. [14] The Five-seven pistol was developed in conjunction with the FN P90 personal defense weapon and the FN 5.7×28mm cartridge. [15]
The AR-57 PDW upper is a new design on AR-15/M16 rifles, blending the AR-15/M16 lower with a lightweight, monolithic upper receiver system chambered in 5.7×28mm. This model is also sold as a complete rifle, supplied with two 50-round P90 magazines. [1]
The CPW (Compact Personal Weapon) is a multi-caliber submachine gun developed by ST Kinetics as a PDW-class firearm. [2] The prototype is chambered in 9×19mm Parabellum, but the manufacturer assures that the weapon's modular design allows for a simple caliber conversion to either 5.7×28mm or 4.6×30mm.
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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 P90, along with a small caliber, high velocity 5.7×28mm cartridge type. [16] The original 5.7×28mm cartridge, called the SS90, went into production with the P90 in 1990. [17]