Since the semi auto VZ 61 is the closest I'll ever get to owning the real thing, I've been considering getting one. Thing is, I would only do it if I could do a Form 1 to make it an SBR and get the folding wire stock for it. My question is, is this even possible with the semi auto version? I've not held one in my hands to be sure, but will they even accept a folding stock? Or have the receivers been altered to prevent any modification? If anyone here has experience with one, I would certainly appreciate any input.