I have a chance to get a special weapons mp5 in .45 ACP. It was bough in PA as a long gun, it has the fake suppressor on it. I was wondering if it is possible to bring in to maryland as a SBR. I all ready have a trust set up. Just trying to see if I could SBR it on a fourm 1 or would I have to have a class 3 shop do the work and do on fourm 4. Any help at all would be great