Dissipator

AndyRexia · Feb 27, 2013

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?

AndyRexia · Feb 27, 2013

BCM has all of those parts except handguard cap. I'm wanting to put black rifle length MOE handguards. Would I need round or triangle cap?
BCM has two front sight assemblies.

http://www.bravocompanyusa.com/mobile/default.aspx#P1850

http://www.bravocompanyusa.com/mobile/default.aspx#P1849

I would need the taper pin set too? I want to make sure I get all the parts I need. Those sights are to different sizes. What are the differences?

JonM · Feb 27, 2013

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

AndyRexia · Feb 28, 2013

So you're saying it would be a pita?

JonM · Feb 28, 2013

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.

Bigcat · Feb 28, 2013

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

SSGN_Doc · Feb 28, 2013

You could get a clamp on front sight, like a folding one from PRI or YHM.

4thPointOfContact · Feb 28, 2013

bluez said:
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.

AgentTikki · Feb 28, 2013

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.

4thPointOfContact · Feb 28, 2013

Easier than a thousand words, right?

4thPointOfContact · Feb 28, 2013

- and the thousand words of explanation I just found, courtesy of CalGuns.Net.

Bigcat · Feb 28, 2013

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

AgentTikki · Feb 28, 2013

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

AndyRexia · Mar 1, 2013

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

Seven · Mar 2, 2013

AndyRexia said:
Never mind. PSA has dissy uppers in stock so I ordered one.

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

AndyRexia · Mar 2, 2013

Seven said:
Read the fine print. Those are "mock" dissipators. Not that there's anything wrong with that.

Yeah that's actually what I wanted

AgentTikki · Mar 2, 2013

AndyRexia said:
Yeah that's actually what I wanted

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

AndyRexia · Mar 2, 2013

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.

SSGN_Doc · Mar 2, 2013

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

AndyRexia · Mar 3, 2013

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

Dissipator

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