OP, I will leave you with this. It is a file I have had for a long time. I suggest if interested you make a copy. I am sorry, I do not have the author, or his expertise, but some for you to think about. I may have to delete it. But just trying to find a way to help you understand your question.
I'd like to see us stop confusing "tolerance" with "clearance." Tolerance is the allowed variance of a machined dimension to it's designed dimension. In other words, .500" +/- .002 is a tolerance reference where +/- .002" is the tolerance. The part can be anywhere from .498" to .502" and be within tolerance. Clearance is the space between 2 mating surfaces. so while Kahr may make parts that are .500" that mate with a part that's .498" that's .002" clearance not .002 tolerance. Other manufacturers than Kahr make their firearms with looser clearances, Kahr makes theirs with tighter clearances. If you say something is built to tight tolerances (a VERY, VERY good thing in machining) it means nothing in terms of how loose or tight the fitment of the parts is. Some will design and manufacture to loose clearances because they can't/don't/won't machine to tight tolerances (the tighter the tolerance the more expensive the machining is) and so must design in more clearance to make up for it. Ever held a gun that seems to rattle? That gun has wider clearances than the one that doesn't rattle. It may be made from parts with tolerances in the +/- .0002's but the clearances are much more open. My $.02 as a manufacturer, although I think people who don't understand the difference will always refer to tight "clearances" as tight "tolerances". My semantics rant over...carry on.
I don’t care about the naysayers’ criticism of Kahr’s break-in recommendation. It’s only common sense to make sure that a self protection firearm, or any mechanical device for that matter, should be broken in by the end user to assess its functionality.
Kudos to Kahr for being pragmatic.
Judging from what I have read in multiple gun forums over the past 20 years, it might behoove all firearms manufacturers to be honest and do the same."
unknown
All, I can tell you is this. I do have plenty of experience with mine and they are NOT going anywhere. All have proven to be exceptionally dependable, easy to shoot and easy to EDC. Yes, I am a fan boy and most likely will not be buying many more Pistols. Just totally happy with what I have.