My STI will chamber a much wider range of rounds that my Glock will.
The STI will run rounds from factory length to beyond 1.20 in .40 caliber. My Glock will not. My STI will feed empty casing from the mag, my Glock will only do this half the time. My STI is almost impossible to limp wrist (I can't do it with shooting with only 3 fingers). My Glock is easy to limp wrist and cause stoppages.
That's why I carry a 1911 and have been called a disciple of JMB.
As a RO, I get to see a ton of rounds go downrange in a number of different platforms. I see a lot of malfunctions in all platforms and I've been sprayed with plastic when guns went Kb(!).
Not picking on Glocks, but I'm not the only one who is seeing problems.
http://glocktalk.com/forums/showthread.php?t=1048944
http://glocktalk.com/forums/showthread.php?t=1048420
http://glocktalk.com/forums/showthread.php?t=1023139
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Now....while all of the above information is TRUE....it is completely anecdotal and isn't really worth anything save for a small case study that opposes the OP. In other words, take it as some basic information, but never think of it as "Truth". This is often my problem with taking advice from "experts" of any kind when they speak in a "matter of fact" type of manner.
Statistically, even if you spent 10 years on the range watching rounds go from a number of different semi-automatic guns, if you didn't accurately log the magazine type, the ammunition type, the shooter's grip, the weapons cleaning/maintenance regimen...on and on...you really can't state that the gun platform is the cause of issues. It may be related, but you can't say it
caused the problem. There are very few valid and reliable studies done regarding guns these days....at least not that I've seen.
LycanneverhadtroublewithanM&Pthrope