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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?
 

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Discussion Starter · #2 ·

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

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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.
 

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

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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.
 

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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 :)
 

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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.
 

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Discussion Starter · #18 ·
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.
 
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