SMG - Suppressed/Subsonic - 5.7x28mm FN - Belgium - 900 RPM - The suppressed P90 was carried by point men in the rescue of the Japanese embassy in Lima, Peru.  It was used successfully to pierce the body armor and kill the leader of the Tupac Amaru terrorists.  The standard Gemtech suppressor is surprisingly small in contrast to many rifle caliber cans.  The difference is due to the much smaller volume of gas generated by the 5.7x28mm cartridge vis a vis the 5.56x45mm.  D.E. Watters