Put yours underwater and film it!
you need to fit the glocks with maritime spring cups.
They were developed for the G17, but as far as I know they will work for the G19 also, but Glock doesn't advise it
SUB CALIBER TRAINING ROUND.
I believe Navy Seals stopped using the Beretta 92sbs cause they fired underwater fine but wore out quickly
The government don't care, they have plenty of money
whats the point in firing underwater?