AR pistol

splatacaster

July 11, 2011 15:39

Recently purchased AR 15 pistol, it has this retro fit piston system on it, one problem it does not work. Meaning it dose not cycle. The bolt key that is fitted onto the BCG, was hitting the piston rod and knowcking the gas block forward enough to off center it with the gas port. So I cut the piston rod down by 1/8 inch, and put a washer between the 5inch ported flash suppresor I have in the 10inch barrel. Brought it to the range and still did not cycle. Could it be the buffer spring, the spring on the piston system? Dose anyone have any clue of what may or may not be happening?
What if I bored the gas port a tinch bigger to insure good gas flow, what would that do????
Thanks

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  Wolf.

  July 11, 2011 15:55

  I am familiar with the gas tube design M16/AR15, but not so much with the gas piston disign cycling system.
  
  However, my advice to you is to either become intimately familiar with the mechanics of the gun's design and functionality or take it to a good gunsmith who is familiar. You could be causing a damage to one degree or the other by "hacking" the thing.
  
  Why don't you try to find some information on the Internet that explains these designs and maybe find a video clip on YouTube or a similar site? Some sites offer a step-by-step instruction with photos for various gunsmithing tasks, too.
  
  You do not offer any circumstances by which you came to posses this gun and that really does not matter. My only point in wondering is that you may have purchased someone elses' disaster gun that they fubar'd. But there an't too much that can't be unscrewed with enough time and money. I am only saying that it would be unproductive for you to add to the problems, since I don't know how much you know (or don't know) about this gun.
  
  The piston system is relatively new, but it sure is not rocket science. Again, I suggest you find a gunsmith familiar with the system unless this is simply a project for you.

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  Laredo Lefty

  July 11, 2011 19:37

  Patrick, DO you know if the person who did the retrofit of the piston system test fired it before you got it?
  
  All of the gas piston kits I have seen have been for the 16" and 20" barrel guns. I have a Professional Ord Ar pistol but it uses the gas tube system. I have not seen any pistols with piston systems, thats not to say they dont exhist. By cutting 1/8" off the piston rod you may have thrown the whole thing out of kilter.
  
  As Wolf said, if your not sure what your doing, and it sounds like thats the case, take it to a gunsmith who is familiar with it.

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