Featuring yet another version of FN USA’s trademark ambidextrous design, the FN P90 and it’s civilian version counterpart the PS90 touts innovative features. From its bottom side spent casing ejector to its unique 50 round top mounted magazine. The FN PS90 is a semi-automatic only sport version designed for the civilian market. It has a 407 mm barrel, an olive drab synthetic stock body. So the most obvious distinguisher you’ll notice by a simple glance inspection between the 2 is the longer barrel on the civilian version. The weapon fires the “new” 5.7 x28 rounds.