Had a buddy just get denied for a 5320.20 to bring an SBR for a competition. It was a 9mm with 9" barrel and 28.75" OAL.
Big red stamp that says "DISAPPROVED. VIOLATION OF STATE LAW".
I haven't found anything that would imply it's not legal. My only guess is the examiner thought it was for MD instead of MO. He handwrote it and I thought it said MD. They have a 29" minimum OAL, so he would've been 1/4" too short.
But, it did have a city and ZIP, so surely they could've double-checked it...but maybe they didn't?
Is there anything weird that would've caused him to be in violation of state law? I have a copy of his form so I can answer most questions about it.