I just got a Saiga .308 21.8" barrel, fixed stock. Here in Michigan, you dont need to register it if it's under 30". With the fixed stock off, the Gun measures almost 31". So if get a folding stock, it will still be over 30" with the stock folded. Is the folding stock itself illegal? What about a pistol grip? I would guess that the length is the main spec, since I can't find any laws stating that the folding stock/pistol grip on their own is illegal.