I have a PLR-16 that over the years - got it 5 yrs ago this month to be precise - has become my "project" gun. I've had my PLR since they first came on the market and have added most all the accessories that I legally can for now. I'm now considering turning my PLR-16 into a SBR. FYI, I know I'll need to pay the $200 tax and do the proper paperwork so the gun will be legal. My question is will an SU-16 rear stock (in particular the "Charlie" model) fit a PLR? Has anyone here checked it out or tried one themselves since this would make it simpler than modifying the PLR for an aftermarket stock. I'd also be able to legally add a vertical grip to the fore end so this would be one nasty little weapon! FWIW, I'm looking into making this my SHTF/home defense weapon... the advantage of a rife cartridge in a (very large) pistol size package that can be used with or w/o the rear stock as necessary.