Read it. Guess I need to wait until I lawfully inherit the revolver. Such a clear as mud cluster-eff.
Thanks for all the help.
In a nutshell, MGL Chapter 140, Section 123 says that a gun needs to meet a set of "safety" criteria in order for a dealer to legally transfer it. There's an exception for
"any firearm lawfully owned or possessed under a license issued under this chapter on or before October 21, 1998."
Basically what that's saying is that if someone with a MA licence owned (or even merely possessed) the gun before the magic cutoff date it can be transferred by a dealer even if it doesn't meet or hasn't been tested against the "safety" criteria in clauses 18-21 of section 123.
So, how do you prove that a gun was
"lawfully owned or possessed under a license issued under this chapter on or before October 21, 1998?" One possible way is to look at registrations. If someone transferred a particular gun prior to that date and there's a corresponding entry in the registration database, it's pretty clear proof that it meets the exception.
With that said, there are many ways that a gun could be legally owned / possessed by someone with a MA license and never be registered so registrations are not a foolproof method. (That's a whole different topic really.)
Bottom line, yes we have registration and yes that's one way to prove that a gun qualifies for the exception in section 123. (It's not the only way of course, and frankly it shouldn't be up to you as the citizen to prove that the gun qualifies for the exception but rather for the Commonwealth to prove that it doesn't. Doesn't really work that way in real life though.)
It's a terribly written law even by MA standards:
https://malegislature.gov/Laws/GeneralLaws/PartI/TitleXX/Chapter140/Section123
If a Handgun does not appear on the EOPS roster, that handgun must have proof of registration in Massachusetts before October 28th 1998, otherwise, we cannot legally transfer the firearm.
This is not 100% accurate but there are dealers who use this standard out of an abundance (arguably over-abundance) of caution.
I'm somewhat confused as to your actual question, but I'll use a Glock for an example.
Glocks in general are irrelevant to the question at hand since most of them comply with the "safety" standards in section 123, making any exception to those standards irrelevant. (They meet the standard therefore they don't need the exception.)