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Thread: Locking Piece Mod

  1. #11
    HKPRO PREMIUM PARTNER
    HkCHUCK's Avatar
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    Quote Originally Posted by hk21man View Post
    Lots of variables.
    What barrel? Was a 40 MP5 barrel made to the 9mmSD spec?
    Amount of ports in barrel etc.
    Whose can? Does it turn std. ammo subsonic like the 9?
    You might just need to find the right angle.
    MM
    Hummm... That's a thought. I have been using 180 Gr ammo which is subsonic to begin with. Maybe the ported barrel, a std. Hk 40 barrel cut
    down to SD length and alternating 2 and 3 holes drilled into the groves of the rifling, is mitigating the recoil impulse sufficiently to cause the
    intermittent failure to eject. The suppressor is a S&H Arms 9mm one I filed a Form 1 on and registered as a new caliber 40 S&W and had the
    baffles opened up slightly to accommodate the slightly larger diameter of the .40 round. The suppressor itself is 12 inches long and fills up
    the cage completely so I am guessing its about 1.6 inches wide.

    I think I am going to get some hotter / lighter .40 ammo and try that.

    Thanks for your input.

  2. #12
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    Just be careful not to over do it.
    Check ejection distance and recoil as to not get receiver dents etc.
    The ports might be taking off to much energy and causing the issue and the sup not making uf for it like cans on other HK's.
    Hard to say as 2 mags fine then fail.
    I would first try slow steady semi and check ejection pattern....see if it starts falling short as you go.
    MM

  3. #13
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    flybynt's Avatar
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    Quote Originally Posted by HkCHUCK View Post
    Hummm... That's a thought. I have been using 180 Gr ammo which is subsonic to begin with. Maybe the ported barrel, a std. Hk 40 barrel cut
    down to SD length and alternating 2 and 3 holes drilled into the groves of the rifling, is mitigating the recoil impulse sufficiently to cause the
    intermittent failure to eject. The suppressor is a S&H Arms 9mm one I filed a Form 1 on and registered as a new caliber 40 S&W and had the
    baffles opened up slightly to accommodate the slightly larger diameter of the .40 round. The suppressor itself is 12 inches long and fills up
    the cage completely so I am guessing its about 1.6 inches wide.

    I think I am going to get some hotter / lighter .40 ammo and try that.

    Thanks for your input.
    @HkCHUCK I might have an extra @26 LP.....Let me check and I PM you if I do
    Thomas Jefferson -
    "When government fears the people, there is liberty. When the people fear the government, there is tyranny."
    "Those who hammer their guns into plowshares will plow for those who do not."

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