A few q's up front.
Can you LEGALLY bring in any pistol to MA and then get it registered? (Or virtually any firearm?)
Is the pistol original or trigger modded to lessen the pull?
Is that pistol from away sold in MA in a 10lb trigger?
The reasons I ask is would the pistol, if modified, still be legal in MA. If not, and it is used in a self defence situation, you'd be in a heap of trouble if they checked the pull weight. A friend of mine, a lawyer, owns a 'ski house' here in VT, and is having a ball buying and modding weapons of all sorts. But, he will not return to NY with ANY of them. He is allowed to own virtually any legal gun here, enjoy it all day long, but always leaves it in the VT safe when he points south. Drives him nuts.