It belongs to a LEO friend who is a SWAT team leader in another state. It's the real deal.
I figured so. The SWAT troopies around here have MP5s in their vehicles in case they get called out while on regular patrol. Those are always fun and easy to shoot.
I was lucky enough to try out a P90 a few years ago when the SHOT show was in Orlando -- my badge gave me access to the LEO section and the fellow I got my admission from was there and got invited, and I was able to tag along.
Lots of fun. Sure zips through those 50-round mags quickly enough. One of the most unique weapons I've ever had the opportunity to handle.
I sure hope the rumours of a Picatinny rail version of the PS90 turn out to be true. Ammo should be more plentiful and less expensive by then, too.