Tried to do a form 1/SBR my H&K SP5. Folding stock put it to 26 inches. I was denied because MD law apparently trumps federal law and requires 29 inches. Guess I will have to use a cheesy brace. I hate my brace for my Kalashnikov USA KP9. I’m not aware of any stocks that put the SP5 OAL over 29 inches. If anyone knows of one, please let me know.