Warning

 

Close
Confirm Action

Are you sure you wish to do this?

Cancel Confirm
AR15.COM
AR Sponsor
9/16/2016 10:43:47 PM EDT
I don't know much about dissy's, never having owned one, but I'm considering one.

Here is the situation...  I currently have an orphaned complete CMMG upper in an A2 configuration - carry handle upper, 20" barrel, rifle gas system, FSB, round handguards (no free float).

I'm probably going to build a lower with a collapsible stock to mate with it, and use it as a training rifle for my son.  Left over from various mods on other guns, I actually have all the lower parts laying around except the striped lower itself and the carbine buffer tube & related.

So where the dissy comes in, I think it would be handier, less front-heavy, for the kid.  I don't want to spring for another barrel, plus the upper has what CMMG described as "extended and polished feed ramps", which basically translates into pseudo-M4 feed ramps cut into a rifle barrel extension & upper, so I'm not sure swapping in a new barrel wouldn't require a new striped upper as well - so I'm staying with the barrel I have.

However, I could send the existing barrel to ADCO to be cut down to 16" and the gas port opened up, without spending a fortune.

So, for the dissy fans out there - what do you think?

What weight buffer would I need to make it run reliably with a standard carbine buffer spring and whatever ADCO would do with the gas port?
9/17/2016 12:08:56 AM EDT
[#1]
Some people run an H or H2.

Mine wouldn't run at all until I put a Wolff minus action spring in it. It cycled pretty harshly so I experimented with buffer weights and it ran anything with an H3 and felt much smoother.

Every one is different.
9/17/2016 1:39:18 AM EDT
[#2]
Do it. I cut one down and drilled the gas port to .110 and it ran fine on a standard carbine buffer and spring.
9/17/2016 7:15:02 AM EDT
[#3]
Quote History
Quoted:
Do it. I cut one down and drilled the gas port to .110 and it ran fine on a standard carbine buffer and spring.
View Quote


This^^^^.

A standard carbine buffer and spring is all you really need. That is as long as the gas port is opened up properly.
AR Sponsor