Just curious, until a few years ago I had always had sidearms with the standard button mag release. I now carry a Glock19 instead of a 1911 because of mag capacity. But now, having had usp40s for a few years the mag release at the base of the trigger guard has REALLY grown on me to the point that I think more manufacturers should consider that design.
I have hands a little larger than average and I still find that the side mount mag release on the flock and other weapons requires a subtle shift in grip to press cleanly. You can manipulate the HK release without changing grip at all with the trigger finger, and I am much faster on mag changes than with the button style. It is just a more user friendly place to put it, not to mention it will be harder to press it accidentally unlike a button on the side.
I am usually a traditionalist but I think HK has something here.
I have hands a little larger than average and I still find that the side mount mag release on the flock and other weapons requires a subtle shift in grip to press cleanly. You can manipulate the HK release without changing grip at all with the trigger finger, and I am much faster on mag changes than with the button style. It is just a more user friendly place to put it, not to mention it will be harder to press it accidentally unlike a button on the side.
I am usually a traditionalist but I think HK has something here.