I looked around online but could not find a definative answer to this one. Does LEOSA negate the need to find pre-ban rifle mags? I assume that you would be fine, but what do you guys think?
Directly from the text of the recently updated law:
(a) Notwithstanding any other provision of the law of any State or any political subdivision thereof, an individual who is a qualified law enforcement officer and who is carrying the identification required by subsection (d) may carry a concealed firearm that has been shipped or transported in interstate or foreign commerce, subject to subsection (b).
The law was drafted to allow nationwide concealed carry (but see also
the Drew Peterson case, where the courts added an interesting spin to LEOSA unrelated to CCW).
What's important to me is the legislative intent; more text from LEOSA 2.
(e) As used in this section, the term `firearm'--
...
(2) includes ammunition not expressly prohibited by Federal law or subject to the provisions of the National Firearms Act; and
Keep in mind this is an update to the original draft of the law. In a middle finger to ban states, they specifically exempted ammo here, likely due to concerns involving JHP in NJ and microstamping bills being proposed in other states. Interestingly, they didn't exempt high cap mags in this update, although that's definitely an issue in some states, moreso than ammo.
What's really important to remember is that while LEOSA is a federal law, almost every "test case" that's come down the pipe so far have been in state level courts. Like FOPA it's only a defense to charges, not Superman's chest emblem.
The official stance on AWB stuff in Mass. is that the LE exemption only applies to guns used for LE purposes, like duty guns and potentially approved off duty guns. As far as I know there's less than a dozen cases of AWB prosecutions in MA, but I have a nagging feeling that one of the cases in particular involved a municipal cop in a gun friendly town in MA being charged by his own agency...we've hashed this out in other threads, I can pull up links if you want.
My belief is that the answer to your question is no, unless of course you're referring to mags for a patrol rifle. There's no higher court cases in MA involving the AWB so I can't give you anything more definitive than my opinion. It's a total crapshoot with the higher courts in MA, especially in gun cases, and including those that involve cops. It's not the kind of fire I'd want to play with if I still lived in that state.