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Thread: Shaved M85 bolt

  1. #1
    Gunco Regular pupwag's Avatar
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    Default Shaved M85 bolt

    Had to try removing the pesky nub.Wasn't too bad. Ground a bit and faced off the nub and the same .015 off the bolt face.That left the extractor a little sloppy so I Mig'd it a touch and reshaped with dremel and file.

    It's only metal, it's not magic.

  2. #2
    Scheiße. Mr_Posthumous's Avatar
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    That a 300aac blackout or whatever? That'd be cool. M85 in 300

  3. #3
    Gunco Veteran patjsimpson's Avatar
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    Interesting... why did you need to change it for blackout?

  4. #4
    Gunco Regular pupwag's Avatar
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    These M85 kits have a unexplained .012/.015 "nub" a bit larger in diameter than the primer
    sticking up in the middle of the bolt face.It screws up the brass when fired.I didn't want
    that happening for this 300 barreled kit.
    New M85 beats up the brass bad - Page 2 - The AK Files Forums
    It's only metal, it's not magic.

  5. #5
    No Hope For Me 1biggun's Avatar
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    hmmm I dont weld on bolts but intesting that you also milled the end of thebolt as well as the face.

    I mill or turn the bevel seen on some bolts onthe endside of the bolt face as some of them keep the round fromn seatin ont the face completly. wish you had a before picture .

    once I get the 6mm br done Ill be looking a 30 dasher that is a 30 BR blown forward for even more capacity it will likley have about 5 grains more capaicty thent hr 300 BO.

    Im not really sure what your gaining with a a 300 BO on a AK as it is just slightly under the 7.62x39????? I suspose having a common ammo that shoots well in bioth guns might be a reason.

  6. #6
    Gunco Regular pupwag's Avatar
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    I'll get a pic of the offending nub today before I skim this other bolt.No welding on the bolt,just the extractor.I wanted this one for suppressor use.
    Before

    After removed .012
    Last edited by pupwag; 09-13-2012 at 06:12 PM.
    It's only metal, it's not magic.

  7. #7
    No Hope For Me 1biggun's Avatar
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    That is odd. the radius to the sides is nice an
    tight. I have seen were the edge of the bolt face would be hold up the round up. On my target stuff i face the face true to the bore.

  8. #8
    Gunco Regular eyegun's Avatar
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    fyi be careful about putting a loaded round in that bolt. The firing pin sticks out the back a little.

  9. #9
    Indian Admin Winn R's Avatar
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    Matt -- what a nice touch.

    Did similar to several bolts some years back -- can't now remember why. Some caliber manipulation lost to time and crs. My mig work on the extractor was like working down a clump of bubble gum.

    Nice work.
    There is no nonsense so errant that it cannot be made the creed of the vast majority by adequate governmental action. -- Bertrand Russell


    "Never attribute to malice that which can be adequately explained by stupidity." Robert J. Hanlon

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