Question About Kahr Slide Stop Pins? - Page 2

Question About Kahr Slide Stop Pins?

This is a discussion on Question About Kahr Slide Stop Pins? within the Kahr Technical forums, part of the Kahr Discussions category; A good informational post.....and out of the Whitehouse too.........

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Thread: Question About Kahr Slide Stop Pins?

  1. #11
    Super Moderator xsailer's Avatar
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    A good informational post.....and out of the Whitehouse too......
    lefty60 likes this.
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  3. #12
    Hero Member lefty60's Avatar
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    Quote Originally Posted by Brazos_Jack View Post
    Since no one has heard of a breakage, I would be willing to venture that they are the same bar stock pin used in the P380. I emailed Kahr about this, but so far recieved no response.

    However, there seems to be a great deal of misinformation around about various manufacturing techniques and their effect on reliability and statistical failure rate.

    Regardless of fabrication technique, it is often possible to use the same alloy and heat treatment. A "perfect" MIM part is almost as strong as investment casting or rolled bar stock or forging. However, MIM is much more likely to have internal voids, inclusions, and other imperfections than investment casting. Investment casting is more prone to these ills than bar and bar is more prone to these ills than forgings. These imperfections will allow internal cracks to initiate at much lower stress than the sound metal around them. Once initiated, these crack will propagate through the sound metal even at normal stress levels until the part fails.

    This is why Ruger makes their highly stressed investment cast parts so thick. This lowers the unit stress per square inch to the point where even that 1 in 100 part with bad flaws is as strong as a thinner forged frame. And in the 90% of parts without bad flaws the extra thickness makes the strength even higher.

    Note that when S&W went to MIM revolver hammers, they moved the firing pin from the hammer to the frame to eliminated the the slot in the hammer face for the firing pin and the cross hole for the retaining pin.
    Gee, I love that kind of Techno Talk! (seriously, thanks)
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  4. #13
    Newbie jjmIII's Avatar
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    Quote Originally Posted by lefty60 View Post
    Famous quote--"Opinions vary". They are both 2 piece, the general knowledge seems to be that the CM has a mim lever, and the CW a machined lever.

    I have not heard of one break, so does it really matter?
    Really? You can see the pin through the lever on a P380, but NOT on the CW380. The CW380 looks one piece to me...which would mean full MIM part.

    Correct me if I'm wrong.

    CW380 Kahr 028CW380 Slide Stop - Style # 028CW380, Kahr Arms Pistol Parts

    P380 Kahr 028P38 Slide Stop - Style # 028P38, Kahr Arms Pistol Parts
    Kahr CW380

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  6. #14
    Hero Member lefty60's Avatar
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    Quote Originally Posted by jjmIII View Post
    Really? You can see the pin through the lever on a P380, but NOT on the CW380. The CW380 looks one piece to me...which would mean full MIM part.

    Correct me if I'm wrong.

    CW380 Kahr 028CW380 Slide Stop - Style # 028CW380, Kahr Arms Pistol Parts

    P380 Kahr 028P38 Slide Stop - Style # 028P38, Kahr Arms Pistol Parts
    I had to use a magnifying glass to see the seam on my CW40 slide stop. It is however, 2 piece. As many rounds as I have put down range with that pistol I tend to not worry about how it was made.

    I believe that a .40 is gonna put more strain on the "pin" than 9mm or .45. Just say'n
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  7. #15
    Super Moderator ron54's Avatar
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    Your right lefty......a 40s&w being a high pressure cart, Is going to be harder on the weapon compared to a 9mm or a 45.........truthfully while there may have been failures of the slide stop.......it would be insignificant compared to any other failures, as I have never read or heard of that part failing on a kahr weapon........again I'm not saying the part can't or hasn't failed, just that for all practical purposes it's a non issue.............ymmv !!
    lefty60 likes this.

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  8. #16
    Hero Member lefty60's Avatar
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    Agreed, none issue!
    "Do as I say, Not as I do"
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  9. #17
    Full Member mr380acp's Avatar
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    It's definitely two piece, just checked my p380
    lefty60 likes this.

  10. #18
    Super Moderator xsailer's Avatar
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    Mine too is two piece.
    lefty60 likes this.
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    God help me fix the things that don't work and provide me the means to permanently DESTROY IT and provide the means of giving a reverse attaboy for those that didn't idiot proof it.

  11. #19
    Newbie dcstancil@fastmail.com's Avatar
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    I have a K40 Elite 98 that I've had about 20 years with several thousand rounds through it. I did have a slide stop pin break after about 2,000 rounds, so I bought several. IMHO, replacing it from time to time is wise.
    ron54 likes this.

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