First Glock I ever handled was soon after introduction of the G17
What struck me first was:
WOW! No Mexican Carry with THIS one.
First off, I KNOW the preferred methods of carrying a pistol, and I always advise people:
Get a well made, properly fitting holster if you're going to carry ANY pistol on your person. At the same time, I harken back to the uncountable times I've crammed a 1911-type or a Browning High Power into my waistband, sans holster. And the times I've dropped fully loaded handguns into a pocket - - Vest, coat, or trousers -- again, without benefit of holster.
Different weapons require differing manuals of arms, and varying ancillary gear. The Glock simply requires:
1. Keeping one's finger away from the trigger until one is ready to shoot, and,
2. A correctly fitting, stiff holster that totally covers the trigger.
Improper gun handling is fraught with peril, no matter the type or brand of weapon. NO firearm is fool proof. No "safety feature," either factory or aftermarket, will ensure that a fool won't have an accident. Fools should not handle firearms.
Best,
Johnny