First---I have an awesome wife. She gave me the go-ahead to purchase a Benelli M3 I've had my eyes on for awhile. Gun Broker...so shipping will take a couple of days. Until then I have a couple of questions for the MDS brain trust. I'm thinking I would like to add an extended magazine tube on this firearm in the not too distant future. I've seen several photos from MDS members who own shotguns with extended magazine tubes so I'm guessing they are pretty much legal with out too much difficulty...but since it is Maryland I feel the need to ask. Also, there was a Benelli M1 thread (I think) where someone posted several OE parts on the Benelli M1 would need to be swapped out in order for the tube extension to be ATF legal... (922R?)so that is another question I have about the M3. Will I need to swap out some parts on the M3 in order to add the extended magazine tube and keep it legal? Thanks in advance for the help!