I Really dislike Cobra Derringers....

Discussion in 'Gunsmithing Forum' started by danf_fl, Jul 28, 2019.

  1. danf_fl

    danf_fl Retired Supporter

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    I had one come in.
    The young man was ranting about how heavy the trigger pull was (okay, an old man about 80 years old).

    I advised him that most people will not lighten the trigger of a derringer for safety reasons.

    Well, someone cut the main spring for the guy. It supposedly lightened the trigger, but it also developed light hammer hits.

    To make the story short, I ended up with the gun after doing a transfer on a .380 he purchased. I got a new main spring from Cobra and installed it. Live fire tests had light hits on the primers (not enough to fire, but I could see where they were hitting). I think the problem could be the main spring, but could something else be hindering the firing pins?
     
  2. towboater

    towboater Well-Known Member

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    Any way to check how far it is protruding ?
     

  3. danf_fl

    danf_fl Retired Supporter

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    The firing pins (with hammer is "fired" position) protrude approx 1/8" at each barrel.
     
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  4. danf_fl

    danf_fl Retired Supporter

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    Fixed it! In my defense, I suffer from "old-timer's" disease.

    It does help if the parts are assembled in the correct sequence. I put the firing pin spring behind the pin instead of in front.

    Doh!
     
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  5. kfox75

    kfox75 Well-Known Member Supporter

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    Sad part is, that's what I was going to ask you about. First time I tore down my dad's, i made the same mistake.
     
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  6. towboater

    towboater Well-Known Member

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    Glad ya got er figured out.
     
  7. BVAL

    BVAL Well-Known Member

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    Happy to see that it did not shoot back at you. :)
    Wait for it,,,,,,,,wait for it,,,,,,,
     
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  8. BVAL

    BVAL Well-Known Member

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    ok
     

    Attached Files:

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  9. Rex in OTZ

    Rex in OTZ Well-Known Member

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    I think the trigger pull is more like 18 lbs.
    But its a pocket pistol ment to be shot just outside of stabbing range.
    I had issues with the cintered metal alternating mechanism crumbling.

    On a Davis rimfire I noticed with the hammer down one of the firing pins will be protruding, that can be a problem for shooters attempting to close it with live rounds in the chambers.
    Its possible for it to discharge on closing.
    After the last shot its best to half cock the hammer.
     
    Last edited: Sep 11, 2019
  10. microadventure

    microadventure Well-Known Member

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    hands like hams can't hold anything smaller than a compact 9. derringers are in the "ain't that cute, now show me something real" category