No they were not "Military grade" if you can call an Assault Rifle that, you would have to define that to give it any meaning. It takes about 10 minutes to swap the parts inside an Ak-47 to make it fully automatic. Does that make it military grade ? It's not illegal to own any weapon in PA unless it is fully automatic. (Not 100% sure I would have to check, but I'm like 90%)
I swear to fucking go there was a P90, I held it in my damn hands, they had an MP5 too, 22. Mod though... Still a MP5... The P90 could be considered a "Rifle" because it had an extended barrel on it.
Side Note: P90 feels like an extension of your arm, its gorgeous.