Pre ban Glock square notch mags

[Massh0le]

Can someone please enlighten me on which mags are considered "pre ban" that are square notched.

im in FL right now and I see a couple used mags for sale but not sure if I can legally own them in MA

 

[saltydude]

No ambi notch. No worries. Impossible for either Glock or the State to determine..

 

[drgrant]

There's an entire horrible thread about this horrible topic here:

https://www.northeastshooters.com/vbulletin/threads/4944-MA-Identifying-Pre-Ban-Glock-Mags

-Mike