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KP31 Suomi Trigger job (Stupid easy)

Discussion in 'Gunsmithing and Repairs' started by tyeo098, Feb 3, 2013.

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  1. tyeo098

    tyeo098 Member

    Jul 5, 2010
    The Old Dominion
    A while ago I had ordered a KP31 Semi-auto Suomi from Centerfire systems.
    Took it to the range a few times but the this had 2 major drawbacks:

    1) It was heavy as balls!
    2) The trigger pull weighed as much as the rifle.

    Since I couldn't do anything about #1, I was playing around in the safe and was seeing if I could improve the trigger in anyway. This was everything from replacing the trigger pack with AR/870 parts, re-polishing the surfaces (already did that) to selling the thing.

    While I was examining the trigger group I saw the limiting pin that keeps the transfer bar pushed down to a certain extent. If I could increase the diameter of this pin, it would push the transfer bar down further, and reduce the trigger pull!

    A few things were tried, and then I wrapped a paper-clip around the pin as it was inserted. and here is the result:

    This reduced the trigger pull weight to about 4 or 5 lbs. Something VERY manageable compared to the 20 or so pounds that it was.

    Not many people have this type of rifle, but for those that do, you feel my pain!
  2. PGT

    PGT Member

    Jan 15, 2013
    Leesburg, VA
    any issues after using it? I'm looking at one of these now
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