Various Beretta pistols have shipped with MecGar mags. No complete list is possible as non-military contract manufacture usually precludes the contractor from announcing they’re who’s doing it.
You forgot that it is a matter of public record that Beretta has subcontracted out US military contract orders’ magazine production to Mec Gar as well. So it’s not just Pietro Beretta or their subsidary Meccanica Del Sarca making ‘factory’ magazines for them.
It is also worth noting that the US military was dissatisfied with ALL the Beretta provided magazines and has since taken the contract for M9 magazines to the US manufacturer Checkmate with far better results.
So, will you be refusing Checkmate made mags, hm?
Mec-gar also makes CZ mags at a fraction of the cost of those by CZ. One of the only downsides to owning a CZ pistol is the high cost of OEM mags.