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Thread: piston system drawings

  1. #11
    gunco irregular moleman's Avatar
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    That looks great, thanks. I found some 1"x2"x8" 6061 fairly cheap and I'll think I'll give it a try. What did you use for the rod going back to the carrier?

  2. #12
    tired of idiots vz58's Avatar
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    Mole dont forget about the fortal guy 7075 t651

    Ok so the piston is a cup that goes over the fixed spigot?

  3. #13
    Gunco Regular chopper's Avatar
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    Quote Originally Posted by moleman View Post
    That looks great, thanks. I found some 1"x2"x8" 6061 fairly cheap and I'll think I'll give it a try. What did you use for the rod going back to the carrier?
    that would be the op-rod(it operates the gun)3/16 Titainium

  4. #14
    Gunco Regular chopper's Avatar
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    Quote Originally Posted by vz58 View Post
    Mole dont forget about the fortal guy 7075 t651

    Ok so the piston is a cup that goes over the fixed spigot?
    yes on this one,im building a new one that has the piston in a cylinder

  5. #15
    gunco irregular moleman's Avatar
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    I kinda like the simplicity of the spigot type set up. I had made up some drawings a while back for a piston setup based off of a FAL piston. At the time original ones were cheap on ebay because everyone replaced them with USA made ones for their parts count. I can get enough 6061 for 4 gas blocks if I don't screw any up for $13. But I just noticed the fortal guy is only about 10-15 minutes from me so I might be able to pick it up and save shipping.

  6. #16
    Gunco Regular chopper's Avatar
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    there is no reason for a piston sys to be complex,
    the most improant thing is were the oprod and gas key meet can be NO
    gap if there is it will beat the snot out of the gas key

  7. #17
    tinkerer extraordinaire Mustangdude20's Avatar
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    and prints of the oprod and do you use an original gas key or did you make a new one as most of the kits do? Also is the piston/ oprod or oprod/key pinned or just a .001 fit? I have one more ? sorry but i'm just trying to grasp this all in my head before i buy material ... What does the end of the piston look like i see the dimension but don't know what its supposed to look like....

    thanks
    Matt

  8. #18
    Gunco Regular chopper's Avatar
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    i made a new gas key it is hardend o1 tool steel it could have been made from 8620,but i had the o1 on hand.
    the oprod to piston is slip fit .
    ("What does the end of the piston look like i see the dimension but don't know what its supposed to look like...".)
    im not shure what your asking? just break all sharp edges

  9. #19
    tinkerer extraordinaire Mustangdude20's Avatar
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    okay but is it cupped on the end or flat and what is the .187 dia. specified for is that a counter bore for the oprod or what is that also a question that I myself feel dumb for asking but is the gas block capped at the end of the bore for the piston and what purpose does the hole for the ar rear take down serve

    sorry these prints are helping but stumping me at the same time as i don't have much exp. with gas piston systems

    thanks again
    Matt

  10. #20
    Gunco Regular chopper's Avatar
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    Quote Originally Posted by Mustangdude20 View Post
    okay but is it cupped on the end or flat and what is the .187 dia. specified for is that a counter bore for the oprod or what is that also a question that I myself feel dumb for asking but is the gas block capped at the end of the bore for the piston and what purpose does the hole for the ar rear take down serve
    flat,
    .187 is for the oprod
    caped at the end?
    if you can mark my drawings were your haveing truble and post it ,it would help me help you

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