If I think about the handguns I own, the last handgun I have picked up in recent years was a Glock 19. From my experience with firearms, it’s mostly about preference because so many handguns are far more reliable than they were 20yrs ago. Lubricants like Slip 2000 and M-Pro7 have gone a long ways form where CLP started from and that was enough to get a firearm to last several hundred if not thousands of rounds longer. When people get into these debates about handguns and how many rounds they will shoot before jamming up, you really have to be realistic, nobody carries hundreds of rounds of handgun ammunition around with them even in combat. It’s mostly officers that have sidearms and the majority will have an M16 with them.
Glocks will run longer but there is also something to be said about a device being easy to use and user friendly. Thumb breaks have been around for a long time but there is something to be said for Blackhawk Serpa holsters since they seem to be a perfect match. I have never had fit issues with the Serpa unlike what I have had with some of my older model Fobus holsters. It is easy to train someone who has their basic firearm safety down, to use the Blackhawk Serpa retention holster. We are a stocking dealer and have most of the Glock holsters for left hand and right handed gun owners.