massachusetts gun laws

Hey guys, this is a question for you in Massachusetts. Im a current resident of Pennsylvania and may be relocating to Ma for a job. I have a large collection of firearms from collectables to semi auto military rifles and hand guns. I was doing a little research about the laws in Ma and Im not quite clear on them. Here in Pa we can almost buy and own anything we want. Im just asking if anybody on here can explain what their laws are.

Thanks
Evan