So, I typed out the response below, and I didn’t delete it in case someone might find it useful, but given the number of these type of threads you have started, I have to question whether you’re sincerely asking or you are trolling us.
If you are sincere, you need to read the following which was posted on the pistol training.com blog by the founder of pistol forum, the late Todd Luis Green.
http://pistol-training.com/articles/...rs-perspective
The issues with LAPD and Portland G 21 or with Gen3s. Not to mention 2006 was 13 years ago. All gun companies have ups and downs in quality. During the mid to thousands all Glock models had some issues due to Glock switching out to new and cheaper suppliers of small parts. At that time clock serial numbers were three letters and three numbers. Sometime after the M prefix Glock change the finish on their slides and began having some issues attributed to tolerance stack and or quality control in their small parts. These issues have since been addressed.
The cults of personality in the gun industry are a topic for their own thread. There are gun personalities in certain circles that will tell you the Springfield Armory XD and 45 is the best polymer frame striker fired 45 auto. Personally I think that’s absolute horseshit but opinions are like assholes, everyone has one. You’ve been warned.
The reality is if you shoot anything enough It will break or experience some type of failure. If you educate yourself and perform proper preventative maintenance you can minimize this.
Everyone also has their own definition of “hard use. “ For some people 2200 rounds is a lifetime of shooting for others it is a week or so.
You also need to understand the Glock 21 is a service pistol designed to shoot full power service ammo. If you want to reload for it you will need to duplicate service ammo. If you want it to run reduced power practice loads like those discussed in the recent 45 minor thread You will need to re-spring the gun.