Dissipator

Discussion in 'AR-15 Discussion' started by AndyRexia, Feb 27, 2013.

  1. AndyRexia

    AndyRexia New Member

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    I currently have a carbine length AR-15. I have a free float quad rail and a low pro gas block. I want to turn my upper into a dissipator upper. I'm thinking I will need a barrel nut, delta ring assembly, a handguard cap, and a front sight assembly. Oh and rifle length handguards. What am I missing?
     
  2. AndyRexia

    AndyRexia New Member

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  3. JonM

    JonM Moderator

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    Your barrel has to be cut with the proper reliefs for a fixed fsb. Not all are.
     
  4. AndyRexia

    AndyRexia New Member

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    So you're saying it would be a pita?
     
  5. JonM

    JonM Moderator

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    no. you just need to contact the barrel maker/supplier to see if your barrel has been profiled to mount a fixed fsb if you plann on using one.
     
  6. bluez

    bluez Well-Known Member

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    For a true dissipator dont you have to move the gas hole on the barrel as well?
     
  7. SSGN_Doc

    SSGN_Doc Well-Known Member

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    You could get a clamp on front sight, like a folding one from PRI or YHM.
     
  8. That kinda depends....
    You could build a dissapator with either a carbine or a mid-length gas system, which remains intact (in the same place) while a front sight base is affixed in front of it. The forward FSB isn't connected to the gas system, of course.
     
  9. AgentTikki

    AgentTikki New Member

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    Yes a true dissy will have a rifle gas system. A mock dissy will have to have 2 gas blocks if you want a fixed FSB up front.
     
  10. [​IMG]
    Easier than a thousand words, right?
     
  11. - and the thousand words of explanation I just found, courtesy of CalGuns.Net.
     
  12. bluez

    bluez Well-Known Member

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    IMO a dissy is not just cosmetic. to have the "dissipation" the gas system should be rifle lenght.
    not just be a dissy-look for the range buddies :)
     
  13. AgentTikki

    AgentTikki New Member

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    real dissys can be problematic, not enough dwell time. mock dissys have that problem sovled. IMHO its gotta work gud, then look gud.
     
  14. AndyRexia

    AndyRexia New Member

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    Never mind. PSA has dissy uppers in stock so I ordered one.
     
  15. Seven

    Seven New Member

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    Read the fine print. Those are "mock" dissipators. Not that there's anything wrong with that.
     
  16. AndyRexia

    AndyRexia New Member

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    Yeah that's actually what I wanted :)
     
  17. AgentTikki

    AgentTikki New Member

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    Honestly a mocks will be a better choice. We are anxiously awaiting our gratuitous pron.
     
  18. AndyRexia

    AndyRexia New Member

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    Dude I'm excited. Will be my 4th, and probably final, build. I've wanted a dissy for a long time. I just love the way they look. Of course it has to function properly too. Its a PSA so I have nothing but confidence. I did a good amount of research before making this thread. I wanted to make my current upper into a dissy upper, just wasn't sure if it was possible. Dumb luck really that PSA put them back up on their site right when I made this thread. I'll post pics once I get it. It's going on a Spike's Punisher lower.
     
  19. SSGN_Doc

    SSGN_Doc Well-Known Member

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    I really liked mine before the boating accident. I had a carbine length gas system.

    [​IMG]
     
  20. AndyRexia

    AndyRexia New Member

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    I'm never taking my guns on a boat. Heard to many horror stories on this site about boating accidents.