Maybe I’m letting my common sense get the best of me here…
But if the rules of a match are causing people to disable a safety device as common as a magazine safety; is the problem with the firearm or with the rules?
Is this a problem in PPC matches also?
Is it really that common?
Springfield armory? No mag disconnects.
Glock? no magazine disconnects.
Sig? On their p210, nothing else that i know of.
Ruger? On their p345.
FNH? optional on contract guns.
Magnum research? nope.
S&W? has it on many guns, optional on the M&P, AFAIK not installed on the 1911. their two newest offerings.
It's largely the product of trying to avoid lawsuits, although some police agencies require them.
Another reason people don't like them is they tend to negatively impact trigger pull. The M&P disconnect is a clever design, and avoids this.
It's not that common, and it's not much of a safety device. I don't professionally get into conforntations with people while openly carrying a firearm, and I don't leave my guns lying around at home? I do shot a lot in competition, and I'd have to buy a magazine just to keep empty and carry it with me dring courses of fire, then make sure I put the empty magazine into the gun at unload and show clear. This is a PITA, and I gain nothing from it.
So no magazine disconnect for me. I like that S&W makes it an optional feature. That way everyone goes home happy.