Is the SP5 3-lug Barrel the same specs as a MP5 3-lug Barrel?
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Thread: Is the SP5 3-lug Barrel the same specs as a MP5 3-lug Barrel?

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    Default Is the SP5 3-lug Barrel the same specs as a MP5 3-lug Barrel?

    Is it Chrome Lined or Melonite? Or? Proof Marks of any kind? Date Codes? American or German Mfg.?
    I need some clarification, if you all care to disclose and assist my education. Thanks.
    Jim
    Jim Corby

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    No. MP5-N is 1/2x32. To make American customers happier, the thread pitch was changed to 1/2x28 on the SP5 and SP5K-PDW.
    SF,

    James

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    Quote Originally Posted by Marine0303 View Post
    No. MP5-N is 1/2x32. To make American customers happier, the thread pitch was changed to 1/2x28 on the SP5 and SP5K-PDW.
    Thank you @Marine0303 .
    But are the dimensions the same as a Standard MP5 barrel, so it can used lets say in a preban HK94? Is it CL or Melonite and MORE IMPORTANTLY is it American Made or German Made? I understand the Navy/Commercial TPI that wasn't even a question. Thanks for any imput.

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    The only difference in the barrels should be the thread pitch as James already mentioned.

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    Not nitrided(ML) or chrome lined either.
    MM

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    Quote Originally Posted by PORSCHE View Post
    Thank you @Marine0303 .
    But are the dimensions the same as a Standard MP5 barrel, so it can used lets say in a preban HK94? Is it CL or Melonite and MORE IMPORTANTLY is it American Made or German Made? I understand the Navy/Commercial TPI that wasn't even a question. Thanks for any imput.
    They are German Manufactured.

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    Thanks to all who responded. Answered all my questions.
    Jim

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    Quote Originally Posted by hk21man View Post
    Not nitrided(ML) or chrome lined either.
    MM
    It is my understanding that at the pressures and temperatures of 9mm, there isn’t a benefit to chrome or ML lining any 9mm subgun barrel. Given your experience across a huge sample of HK barrels in all calibers, would be interested in your thoughts and observations.


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    Based on my very amateur understanding of nitriding, I would think that it certainly isn't a detriment, and would provide some additional corrosion/erosion resistance even if it's not "necessary". Chrome lined on the other hand can affect accuracy.

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