One Toni System part fits most of the 92 family: an oversized magazine release. Ten Beretta models list it, which is why you meet it on so many model pages.
Why a bigger button
The factory release on a 92 is small and sits where the thumb has to stretch for it. A larger, textured button is found and pressed without shifting the grip, so the empty magazine drops sooner and your hand is ready for the next one. A firm click tells you the press worked.
Watch for accidental drops
A bigger button is also easier to hit by mistake, for example in a tight holster or with a high grip. Check how it sits with your gear before a match.