I would like to make a SBR out of a Master Piece Arms MPA-10 pistol. From the research I have done it appears I will have to fill out a form 1 and get the chief law enforcement officers signature. I live in Houma and would assume that Sheriff Vernon Bourgeois would be the signature required. If anyone on here is from Terrebonne Parish, do you know if he has a problem signing off on NFA weapons? Another question I have is on the overall length of the firearm. As I am not supposed to have the stock in my possession before the BATF gives the ok how do I go about this. Do I just estimate what I think the shortest overall length would be?? Any help from those of you who have done this would be greatly appreciated.