Dissapator Build - Which Barrel?

So I am looking to do a dissy DMR type build. So far, here what I have found as bbl options:

The Adco Custom Cruiser Barrel Kit -

http://i187.photobucket.com/albums/x...rbarrelkit.jpg


The CMMG Medcon with mid-length gas system -

http://i187.photobucket.com/albums/x...randmidgas.jpg


The CMMG Medcon with rifle length gas system -

http://i187.photobucket.com/albums/x...onriflegas.jpg


I think I like the idea of the rifle length gas system. My only concern with this route is if I will get enough gas dwell.

Thoughts?

This has been talked about a couple of times at these threads.

https://www.m4carbine.net/showthread.php?t=47807
https://www.m4carbine.net/showthread.php?p=547340

I have a Bushmaster dissipator barrel with a carbine length gas system. My barrel is really accurate. I have it setup on a A1 Colt upper with A1 handguards (which I had to modify internally slightly to fit around the gas block).

I would stay away from the rifle length gas system as Colt tried it with the Model 605 and it was very unreliable due to the limited dwell time.

I lightened this rifle for my girls to use shooting irons. The gas hole is around .110 and at that it is a very soft shooter.
The middy gas would be ideal if I were to do it over again.
http://i228.photobucket.com/albums/e...et/Chopped.jpg
http://i228.photobucket.com/albums/e...pedexposed.jpg

I would go ADCO all the way. Even the tards on Arfcom are starting to figure out that CMMG is a big gamble.

I still have yet to get much more than 100 rounds through my adco custom cruiser, so I can't give it a super combat rating. But Adco's reputation is 100 time that of CMMG.

Thanks. So, what's the problem with CMMG?