|Pistol, Submachine Gun Ammunition|
|Manufacturer:||Fabrique Nationale Herstal|
The 5.7x28mm is a pistol and submachine gun cartridge designed and manufactured by FN Herstal for the Five-Seven and P90. Instead of using the common 9x19mm cartridge, FN developed the 5.7x28mm as a high-velocity armor-piercing alternative. Firing a small 32gr. projectile at 2,350fps(feet-per-second), the cartridge produces approximately 400ft-lbs of muzzle energy. This is comperable to the 9x19mm in energy but the much higher velocity increases the range and armor-piercing capabilty somewhat. In actual ballistic testing the commercial SS192 failed to penetrate level IIA kevlar armor, and the performance of the standard duty SS190 cartridge has been heavily criticized against unarmored targets.
However when compared to the 9x19mm the cartridge is approximately half the weight and produces about 30% less recoil, making it more controllable and allowing the operator to carry more ammunition.