I have seen some AR-15 lowers for sale marked and registered as pistols. The idea being, i guess, that you buy it under the pistol rules (21 years old, waiting period, etc.) and then you can have any length of barrel and over-all length you want. Sounds much simpler and easier than the Form 1...
MD annual reporting for SBRs and cans?
So there is some kind of annual reporting requirement for Machineguns in MD, but what about SBRs and supressors?