AR15.Com Archives
 Regarding the CMMG .308 MK3 offered by CDNN...
BB  [Member]
12/24/2011 5:12:28 PM
Is it forged or billet; what alloy?
What gas system?
Is the barrel nut (or any other part, for that matter) proprietary?
What height receiver is it, what rails other than CMMG will mount up flush?
Will it work with aftermarket FCGs (unconfirmed rumor is geissele dont work)?
What pattern is the barrel extension/bolt, ArmaLite, SR25 or ?
Is the receiver extension milspec or commercial?
firststrike51  [Member]
12/24/2011 8:19:45 PM
Cant answer any of your questions,id like to know the answers too but...
just thought id let you know there is a CMMG 308 sst on cheaperthandirt.com that looks to be very similar
BB  [Member]
12/26/2011 4:52:02 PM
Someone from CMMG care to respond??
vranasaurus  [Team Member]
12/26/2011 5:26:14 PM
I don't have one of the ones offered by cdnn but I do have a mk3 prototype and I have a geiselle sea in it and it works great.

My upper is the high profile dpms variety. I don't know if they changed at all. I believe they use dpms pattern barrels and barrel nuts.
shadowcop  [Team Member]
12/26/2011 7:13:40 PM
I would love to answer your questions but have not laid hands on one. With any luck, I'll go back to work and have one soon.
Dave N
CMMGinc  [Industry Partner]
12/27/2011 9:48:08 AM
Originally Posted By BB:
Is it forged or billet; what alloy?
What gas system?
Is the barrel nut (or any other part, for that matter) proprietary?
What height receiver is it, what rails other than CMMG will mount up flush?
Will it work with aftermarket FCGs (unconfirmed rumor is geissele dont work)?
What pattern is the barrel extension/bolt, ArmaLite, SR25 or ?
Is the receiver extension milspec or commercial?


Billet 6061T6 is used for both upper and lower receivers.
Standard gas at the mid length.
The barrel nut/rail system is exclusive to us.
Most FCG should work, the Geissele triggers should work fine.
All the parts LR308 pattern, so primarily SR25 compatible, the uppers are the old DPMS height.
The receiver extension is the mil-spec diameter.
BB  [Member]
12/27/2011 10:47:36 AM
Thank you! So if I wanted to swap the rail out for a DD 7.62 rail/barrel nut that should work right? I would want a rifle-length rail system.
jdubya87  [Team Member]
12/27/2011 11:06:59 AM
Originally Posted By BB:
Thank you! So if I wanted to swap the rail out for a DD 7.62 rail/barrel nut that should work right? I would want a rifle-length rail system.


I'm also curious about this. Wanted to do a LaRue setup.
CMMGinc  [Industry Partner]
12/27/2011 1:00:40 PM
As long as you select the barrel nut for DPMS 308s