Question About Kahr Slide Stop Pins?

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; Does anyone know if the slide stop pins (not the slide stop levers) in the P380 and CW380 are the same? Kahr states that the ...

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Thread: Question About Kahr Slide Stop Pins?

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    Newbie Brazos_Jack's Avatar
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    Question About Kahr Slide Stop Pins?

    Does anyone know if the slide stop pins (not the slide stop levers) in the P380 and CW380 are the same?

    Kahr states that the “slide stop” is machined from bar for the P380 and MIM for the CW380.

    However, the pin part of the slide stop is one of the most highly stressed parts in the entire pistol and they make a big deal here -

    Kahr Slide Stop Pin

    - about the slide stop PIN being made of ultra-high strength magical unobtanium.

    So, are Kahr “slide stops” two piece assemblies with the same pins in both P and CW series, but machined versus MIM levers?

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    Hero Member lefty60's Avatar
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    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?
    "Do as I say, Not as I do"
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    Super Moderator ron54's Avatar
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    I agree..........and the answer would be no........ !!!

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    Newbie Brazos_Jack's Avatar
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    If the pin itself is MIM, I will not bet my life on it. If it is only the lever is MIM, then I don't care. The lever sees only the smallest forces. The pin is probably the highest stressed part in the entire gun.

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    Hero Member BillACP's Avatar
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    MIM doesn't translate to being inferior from a physical property standpoint of the alloy & can match forged steel parts for durability...forged / machined parts are not immune from stress related issues including brittleness.
    ron54 and lefty60 like this.

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    Super Moderator ron54's Avatar
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    Today's mim parts I think being heat treated are pretty tough..........I will agree that their are more failures with them than tooled steel..........but I've never experienced any issues with them....... and most manufacturers today use them in their weapons. So for me, I don't have a problem with them......unless I was buying a custom 1911 for example and paying a few thousand premium for it......then I would want tooled steel parts, otherwise a non issue......
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    Full Member SlowBurn's Avatar
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    If you're concerned, buy the machined slide stop for the p380 and use it in your cw380. $24.20 plus shipping and you can stop worrying
    Kahr 028P38 Slide Stop - Style # 028P38, Kahr Arms Pistol Parts
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    Super Moderator ron54'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?
    I also have never heard of one breaking ............
    lefty60 likes this.

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    Newbie Brazos_Jack's Avatar
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    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.
    lefty60 likes this.

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    Super Moderator ron54's Avatar
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    Good info and post there jack.......

    The hardest part about a Zombie
    Apocalypse is trying to act like
    I'm not excited ..... !!!!

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