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The 5.7×28mm cartridge was designed by FN Herstal specifically for use in the FN P90 personal defense weapon and FN Five-seven pistol. [11] Subsequently, it has been used in a number of other weapons, such as the FN PS90 carbine and the AR-57, an upper receiver for M16 and AR-15 rifles.
The FN Five-seven (stylized as Five-seveN) is a semi-automatic pistol designed and manufactured by FN Herstal in Belgium. [8] 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]
Mitrailleuse d´Avion Browning - F.N. Calibre 13,2 mm airplane machine gun FN Five-seven pistol with 5.7×28mm cartridges P90 personal defense weapon United States sailor fires an M240B, a U.S. version of the FN MAG, adopted for infantry use in the 1990s Early M249 manufacture of FN Minimi U.S. Marine aiming FN 303 fitted with holographic weapon sight FN 5.7×28mm cartridges as used in P90 ...
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]
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]
Firearms designed and/or manufactured by FN include the S.A.W. M249, Browning Hi-Power and Five-seven pistols, the FAL, FNC, F2000 and SCAR rifles, the P90 submachine gun, the M2 Browning, MAG, Minimi and the FN Evolys machine guns; [3] all have been commercially successful. [5] FN Herstal's firearms are used by the armed forces of over 100 ...
The listed value for the kinetic energy is 540 J, however if you use KE=(1/2)(m)(v)^2 the actual value should be around 360 J, using the values m=1g and v=850. If you rearrange the equation using the listed kinetic energy and velocity to solve for mass, m=2(KE)÷v^2, the value of the mass should be near 1.5g.
The Ruger-5.7 was introduced in December 2019 to be a more affordable alternative 5.7x28mm semi-automatic pistol compared to the FN Five-seven pistol (which had been the only other 5.7x28 pistol available to the civilian market for over 20 years). [5]