u/whatinthee

Does anyone here have experience with Massachusetts magazine-capacity laws?

I’m trying to understand whether a 17-round magazine can legally be converted to 10 rounds using a Magblock and then permanently sealed with epoxy or sealant. My understanding is that MA cares about whether the magazine can be “readily converted” back over 10 rounds, so I’m wondering what actually counts as permanent enough.

Has anyone done this in MA, had an FFL/gunsmith do it, or gotten a clear answer on whether epoxy/sealant is acceptable? Not looking for legal advice, just real-world experience or pointers to the relevant MA law/guidance.