I was at a gun show today and heard something I've never heard and am not sure of. A guy there said he had a FA PS90. I asked if he was a 07/02 and he said no. I then asked how he did it legally. He said a RDIAS. This confused the crap out of me because the P90 didn't exist before May '86. He claimed a RDIAS registered as a sub machine gun was legal to drop in the trigger pack. I think he was full of sh!t. Just like the FNC sears can't be put in a SCAR 16S according to the ATF, wouldn't this be about the same? Does anyone know if a PS90 can be made legally FA or was this guy talking out of his a$$?