Kahr seems to have the best solution and a US patent to go with it. ... Kahr seems to have the best solution and a US patent to go with it.
You must have spent some time reading Kahr press releases!! Kahr has the best solution? More likely it's just
another solution. Wilson Combat's 10-round 9mm single-stack mag is
another solution, and I'm willing to bet that Wilson has far more of his 9mm hi-cap mags in use than does Kahr. Hi-point, as noted in prior responses, offers a 10-round 9mm single stack, and there are aftermarket versions that hold 15 rounds available.
That fearsome 9mm taper doesn't seem to be too big a problem for those mag makers.
By the way: a patent just means that some feature of a design can't be copied without consequences. It means that the "protected" feature is UNIQUE, not that it's necessarily the BEST solution.
agent109 said:
Kel-Tec uses a Mag Gear mag from Italy and after a few hundred rounds the single stack PF 9 will cut a nice groove in the mag follower because of the phenomena whereas a very high tension mag spring is used this will cause the last round to fail to feed.
That's Mec-Gar, not Mag Gear. Except for 1911 mags, Mec-Gar is considered the gold standard for magazines. If you have a Luger with mag problems, for example, Mec-Gar has the solution. Single-stack or double-stack -- it doesn't matter. Many major gun makers use Mec-Gar as their OEM supplier. Kel-Tec is not unique in that respect.
I have a PF9. It holds seven rounds.
If it were to hold more rounds, it would no longer be an easily concealed "pocketable" weapon -- the reason I bought it. I've been shooting it, off and on, for several years, now. I try to shoot it each time I go to the range. I've got several hundred rounds through it. If that follower ever becomes a problem, I know how to replace a follower -- and Kel-Tec will probably send me one free of charge.
Interesting aside: you can chamber a round in a Kel-Tec PF9 and still load a full 7-round mag. Kahr mags work fine when you start with a loaded 7-round mag and chamber the first round using the slide release. If you chamber a round and then load a 7-round Kahr mag there are sometimes feed problems. Kahr warns against 7+1 in their manual. Maybe Mr. Moon should work on THOSE mags?
agent109 said:
I also had a long conversation with their engineering staff as well when I was at their factory as well in Cocoa Beach FL..
Kel-Tec is a questionable expert source regarding hi-cap single-stack mags; their only single-stack 9mm gun was designed to be a very small, light, and concealable weapon. A long, hi-cap mag in that gun would work at cross-purposes with its design objective. I doubt they've spent much time working on hi-cap single stack mags.
agent109 said:
..with all due respect I will trust the gun makers engineering staff over any internet bloviation.
Some might accuse you of a bit of bloviating, here. You seem to be trying to "argue from authority" by citing discussions with gun designers, but you tell us NOTHING of what they said about high-cap single stack mag design. You imply that your opinions are based on those discussions. Perhaps, but I'd rather hear it from the sources themselves. Do you have any website links, textbook or technical source citations, or personal correspondence supporting your claims that can be shared with us? Your arguments, thus far, haven't really offered much in the way of evidence or proof; they also fly in the face of what a number of us know, have seen and used.. You're only argument seems to be "I'm right. Trust me."
On the other hand, I do respect K-T's technical expertise. I suspect that if Kel-Tec really wanted to develop a
very high-cap mag for some of their smaller guns (including 9mm) they could do it.
But a single stack mag hi-cap would simply be too large for those guns -- and THAT is the reality you continue to ignore. Hi-cap single stack mags are cumbersome and hard to use in most handguns. I'm not sure there's much demand for them, except for 1911s and Hi-Point carbines.
Kel-Tec has developed a 30-round .22 WMR magazine that works like a charm. Until they did that, the largest mag available (for use in an Automag II .22 WMR) was a 10-round single-stack. Earlier versions held 6 or 7 rounds.
The .22 WMR is a rimmed round that presents a greater technical challenge for a gun designer than the very slightly tapered 9mm round.
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