I think you can get a shorter barrel for that maverick and make it into a HD shotgun pretty easily.
I have a stock like this on my Mossy:
http://www.combatstocks.com/Recoil_...olding_Shotgun_stock_with_Tactical_Forend.cfm
Trying to find a link for the barrel.
I have a stock like this on my Mossy:
http://www.combatstocks.com/Recoil_...olding_Shotgun_stock_with_Tactical_Forend.cfm
Trying to find a link for the barrel.