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AR15.COM
12/21/2011 8:42:20 AM EDT
I've have a couple questions.



1.  I have a Ceiner kit and would like to convert it to a dedicated upper.  Can I do this with your parts?  I don't know how much, if there is any between the two kits.  (Of course I could just steal my boys and give him mine.  But anyway.....

2.  What parts would I need for this dedicated conversion?  Thanks.
12/21/2011 9:35:37 AM EDT
[#1]
You would need the CMMG barrel/collar. It may or may not require minor fitting to the rail. If it does, it's just a small amount of filing to the rail.
Dave N
12/21/2011 10:16:41 AM EDT
[#2]
Quoted:
You would need the CMMG barrel/collar. It may or may not require minor fitting to the rail. If it does, it's just a small amount of filing to the rail.
Dave N


+1

If you don't know where to file, shoot me a PM and I can send you a picture. But, better yet, you know you really want the Stainless Steel one anyway.......
12/21/2011 2:44:09 PM EDT
[#3]
Either way but it should work perfect after you get the collar installed...
I've done several. I do love stainless CMMG Bolts though...

Dave S
12/21/2011 3:32:37 PM EDT
[#4]
Thanks, don't I need something to keep the bolt from shooting out/off when I pull the carrier group?  
12/21/2011 3:49:07 PM EDT
[#5]
The BCG is self contained. The CMMG collar has a spring detent that snaps onto the CMMG barrel.
It won't come out until you pop it out.
I do agree though, the stainless is much better than the parkerized. You will eventually get one.
Dave N
12/21/2011 8:14:03 PM EDT
[#6]
I see.  I guess I need to add that I'm currently using a 5.56 bbl not a dedicated bbl.  I would like to dedicate the current bbl.
12/21/2011 9:38:16 PM EDT
[#7]
Quoted:
I see.  I guess I need to add that I'm currently using a 5.56 bbl not a dedicated bbl.  I would like to dedicate the current bbl.


??????

You want to just use your 5.56 barrel for .22? Just put your conversion kit in there and go shoot. If you are going to put a lot of .22 through it you need to either shoot some 5.56 though it once in awhile to clean out the gas system, or block off the gas port.

Maybe we are all confused by just exactly what it is you want to do.
12/22/2011 11:29:54 AM EDT
[#8]
My bad, sorry.  I would like to take an existing 5.56 bbl and make it a dedicated .22.  I would like to do the collar so that if I have to remove the BCG it would be just the body, not the chamber adapter.  I'm thinking that I will just have to buy that locking collar and just use that.  Its a shame it is $89 though.  




12/22/2011 11:34:42 AM EDT
[#9]
You seem to be confused by the whole conversion thing. You can't leave the "collar"/adapter in the chamber and remove the rail, bolt, and spring assembly. It comes out as a single unit.
The locking lug locks the entire assembly into the chamber.
12/22/2011 2:58:43 PM EDT
[#10]
Nah, not confused, just learning.  LOL



I've been running a conversion for YEARS, I just got my SBR stamp and wanted to make one of my uppers a dedicated upper w/o putting a new bbl on it.  If someone made an insert for the chamber that could be semi-perm installed that would be sweet.  That way I could just get that collar, insert the insert and commence shooting.  
12/22/2011 3:21:34 PM EDT
[#11]
The collar snaps onto a dedicated .22 barrel.