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Thread: piston system drawings

  1. #21
    Gunco Regular allesennogwat's Avatar
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    I had a Rhino gas piston conversion 20 years ago. The replacement key had a pin portion that went in to the bolt carrier as using the bolts alone would result in sheared bolts. They would get knocked loose first too. The pin was a tight fit in a hole in the bolt carrier between the two bolts. The pin can be part of the key or maybe a separate pin but must fit both the key and the bolt carrier tightly. The gas key bolts aren't strong enough alone to hold up to a gas piston system.

  2. #22
    Gunco Regular chopper's Avatar
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    yes it has a pin that is hardend

  3. #23
    tinkerer extraordinaire Mustangdude20's Avatar
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    okay is the bore that the piston rides in capped at one end to contain the gas? and what is the takedown hole for?

  4. #24
    Gunco Regular chopper's Avatar
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    ok i took some more pics hope thay help






  5. #25
    Gunco Regular allesennogwat's Avatar
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    When I did the Rhino conversion removing the gas rings resulted in a very loose fit between the bolt and the bolt carrier. I noticed on my AR-10 the bolt is a close fit with the bolt carrier even without the gas rings. In fact my AR-10 will function with the original gas system with the gas rings removed from the bolt. I know 308 makes more gas than 223 but I think a lot of it is the close fit between the bolt and bolt carrier. The Ar-15 seems to leave a lot play with the gas rings removed. Maybe different brands of parts might fit together differently.

  6. #26
    tinkerer extraordinaire Mustangdude20's Avatar
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    WOW!! i feel like a real dummy now but it all makes sense any dims of the oprod? by the way chopper you are the man sir!

  7. #27
    Gunco Regular chopper's Avatar
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    the oprod is .187dia titanium how long? don't know,what fits my rifle wont fit on yours unless you have an 18"AA barrel bolt kit

  8. #28
    tinkerer extraordinaire Mustangdude20's Avatar
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    what about the "sleeve" or "piston" that goes over the spigot?

  9. #29
    Gunco Regular allesennogwat's Avatar
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    I've noticed most gas piston systems (apart from the M-14) have a spring to return or hold the gas piston / op rod forward. It might only be a factor when the bolt is held open and I have tried the FAL with the spring and it works. Maybe it's just to keep it from rattling around or to hold it forward when the top cover is the stripper clip type but even rifles without stripper clip loading usually has a spring for the gas system.

  10. #30
    Gunco Regular chopper's Avatar
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    Quote Originally Posted by Mustangdude20 View Post
    what about the "sleeve" or "piston" that goes over the spigot?
    it is titanium but it dont need to be i just realy like titanium

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