I have a Benelli M1 Tactical and want a 14" barrel for it but want to be able to train out of state with it. If the receiver is marked appropriately with SBR markings, could I put my legal 18.5" barrel BACK on it and transport out of state without the form red tape and headache? My suspicion is that I cannot because the RECEIVER is marked as an SBR. Anybody know for sure?