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Thread: Old School MiniMag Bolt Stuck in Barrel

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  1. #1

    Old School MiniMag Bolt Stuck in Barrel

    Greetings.

    please excuse me for being a 1 time signup and poster

    I've been out of paintball for 2 years since my daughter was Born.

    my Brother gave me his busted up oldschool Minimag a year or so ago, and i'm just gassin' her up now.


    These are the issues.

    1) when first gassed up, air came out the back vent.= i stripped and oiled all o-rings. no longer leaks
    -there is a big spring that looks a tad rusted

    2) Now when gassing up trigger charges fine into place, but when i fire the bolt doesn't cycle back, it stays in the barrel.
    - i can push the barrel back into place with a squeegee, when doing so i hear a click, almost like a sear.

    little help would be great.

    NOTE: this is a Stock mechanical minimag, nothing fancy

    im guessing im going to need a rebuild kit either way by the end of this.

    thanks yall

  2. #2
    Join Date
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    So when you gas it up now, it fires once and the bolt does not reset?

    How hard do you have to push on the bolt to get it to reset?

    Sounds like a weak bolt spring perhaps.

    I would recommend having a parts kit handy regardless. If it is the bolt spring, the kit comes with one.

  3. #3
    might benefit from a good cleaning, check the inside of the body for goop and also the bolt and put a little oil on the tube the bolt sets on and levi is probably right about the bolt spring.

  4. #4
    Quote Originally Posted by Levi View Post
    So when you gas it up now, it fires once and the bolt does not reset?

    How hard do you have to push on the bolt to get it to reset?
    That's Right Bang, no cycle

    Now to push the bolt back, it's hard to say how much cause i'm being rather gentle with the pressure. I'm used to working on Cockers ( HIIIIIISSSSSSSSSS ) and one push too hard can mess those puppies up good.

    If it helps any, when the bolt is stuck in the barrel i can't take the barrel off. i can twist lock out, and spin the barrel, but it wont come out. I can old hear the spring making noise as i spin as well ( i'm sure that irrelevant but hey ever little clue helps )

  5. #5
    check your barrel for wear

  6. #6
    Join Date
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    Quote Originally Posted by Jerb View Post
    That's Right Bang, no cycle

    Now to push the bolt back, it's hard to say how much cause i'm being rather gentle with the pressure. I'm used to working on Cockers ( HIIIIIISSSSSSSSSS ) and one push too hard can mess those puppies up good.

    If it helps any, when the bolt is stuck in the barrel i can't take the barrel off. i can twist lock out, and spin the barrel, but it wont come out. I can old hear the spring making noise as i spin as well ( i'm sure that irrelevant but hey ever little clue helps )
    Like Vintage said, a good cleaning if you haven't done so already. I could see it doing this if there was a bunch of paint and gunk built up around the sear.

    The barrel thing is kinda interesting...
    Degas the marker and remove the bolt and barrel. Without any bolt spring in place, make sure the bolt slides into the barrel freely by hand. Could be a ding or other sort of damage to the barrel that's dragging on the bolt.

  7. #7
    check your barrel for wear
    Like Vintage said, a good cleaning if you haven't done so already. I could see it doing this if there was a bunch of paint and gunk built up around the sear.

    The barrel thing is kinda interesting...
    Degas the marker and remove the bolt and barrel. Without any bolt spring in place, make sure the bolt slides into the barrel freely by hand. Could be a ding or other sort of damage to the barrel that's dragging on the bolt.
    Will do tomorrow and will update

    thanks a Mil for your help so far

  8. #8
    Join Date
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    How far does your bolt spring protrude beyond the bolt face?

  9. #9
    Quote Originally Posted by Laku View Post
    How far does your bolt spring protrude beyond the bolt face?
    Quote Originally Posted by vintage View Post
    check your barrel for wear
    Quote Originally Posted by Levi View Post
    Like Vintage said, a good cleaning if you haven't done so already. I could see it doing this if there was a bunch of paint and gunk built up around the sear.

    The barrel thing is kinda interesting...
    Degas the marker and remove the bolt and barrel. Without any bolt spring in place, make sure the bolt slides into the barrel freely by hand. Could be a ding or other sort of damage to the barrel that's dragging on the bolt.
    I've taken some Photos so you can all see what im working with.

    Barrel has a little wear only on that side pictured


    picture shows how far spring protudes past bolt face, along with rust


    not sure if relevant but this is what this part looks like what ever it may be

  10. #10
    replace that spring and from the color of your O-rings I would go thru the whole valve. get a scotch brite pad and clean all the spots off of the bolt and the end of the valve and it looks like the end of the barrel could use cleaning and probably the inside of the body. put a little oil on the outside of the bolt as well as inside when you reassemble.

  11. #11
    Quote Originally Posted by vintage View Post
    replace that spring and from the color of your O-rings I would go thru the whole valve. get a scotch brite pad and clean all the spots off of the bolt and the end of the valve and it looks like the end of the barrel could use cleaning and probably the inside of the body. put a little oil on the outside of the bolt as well as inside when you reassemble.
    that picture i have of the valve, is that as much as i can take apart or is there more O-inside?

  12. #12
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    Yep... what Vintage said ^^

    Video walkthrough for teardown and rebuild:

    http://www.youtube.com/playlist?list=PL236834DEAD3EE136


    *edit*
    There is more to the valve than what you have pictured... video should make everything clear

  13. #13
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    The bolt spring definitely looks like it's in need of a replacement.

  14. #14
    Join Date
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    Quote Originally Posted by vintage View Post
    put a little oil on the outside of the bolt as well as inside when you reassemble.
    Do not ever put any oil on the bolt spring or bolt. The oil will transfer to the inside of the barrel and to the sides of the balls. It will cause the balls to spin when fired and the gun will become very inaccurate. Keep the bolt and spring clean.
    Except for the Automag in front, its usually the man behind the equipment that counts.

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