The P90 TR (left) and the standard P90
Again developed for tank, artillery and air crew, FN Herstal trialled many types of pistol ammunition before developing the 5.7x28mm cartridge. Much like a scaled down 5.56mm rifle cartridge, the 5.7 round has similar ballistic and penetration characteristics as H&K's 4.6mm round, leaving the muzzle of the 'ninety at around 6-700 metres per second.
The P90 is a blowback operated, selective fire weapon. It is fed from 50-rounds box magazines, made from transluscent polymer. The magazine is being located above the barrel, with the cartridges being aligned at 90 degrees to the barrel axis. Each magazine has built-in ramp that rotates cartridge to align it with the barrel prior to chambering it.
As with most PDW class weapons, the P90 controls are completely ambidextrous, with charging handles located at the both sides of the weapon, and the safety/fire mode selector is located below the trigger. The P90 also features downward ejection of the spent cases. Built in a bullpup configuration, and constructed largely of polymer components, the standard P90 features a built-in reflex collimator sight with 1X magnification and light sensitive reticule as well as a set conventional iron sights situated above the optic array. The variant P90 TR (tactical rail) features a rail integration system (RIS) for further tactical optimisation. Both can be used with the optional silencer/suppressor unit in conjunction with 5.7mm subsonic round.
The P90 and one point sling
Caliber: 5.7x28mm
Weight: 2.54 kg empty; 3 kg loaded with 50 round magazine
Length: 500 mm
Barrel length: 263 mm
Rate of fire: 900 rounds per minute
Magazine capacity: 50 rounds
Effective range: 200 meters
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