Search found 9 matches

by Downrange
Fri Jul 27, 2012 7:02 pm
Forum: Silencer Discussion
Topic: New CMMG upper FTF issues...
Replies: 3
Views: 2001

Re: New CMMG upper FTF issues...

I'm adding to this thread to keep the audience broader. New developments, it seems the PNW 220 grain ammo cycles the CMMG upper/lower combo just fine (using an H1 buffer now). Talked with an experienced AR guy today, and he actually called his POC at CMMG who said the Remmie 220 grain is notorious f...
by Downrange
Wed Jul 25, 2012 10:12 pm
Forum: CMMG
Topic: Short Stroking with the can in place. Any help appreciated
Replies: 9
Views: 8233

Re: Short Stroking with the can in place. Any help appreciat

Thanks, I'm not sure this applies to the CMMG M-4 styled upper (has the standard M-4 gas arrangement, not a flat=top or compact model. It's either on there right or not, not adjustable, at least that's what CMMG said when I called today. I'm trying a heavier buffer, that and see if the action "...
by Downrange
Wed Jul 25, 2012 2:12 pm
Forum: CMMG
Topic: Short stroking with CMMG 16 inch upper - conversation/CMMG
Replies: 4
Views: 4384

Re: Short stroking with CMMG 16 inch upper - conversation/CM

Thanks for all the replies. I will probably try the heavy buffer first, as that seems to make sense and isn't too expensive. I will report back here after more testing.
I have shot a few rounds of full power, and they cycle fine.
The upper is accurate - no problem there.
by Downrange
Wed Jul 25, 2012 12:14 pm
Forum: CMMG
Topic: Short stroking with CMMG 16 inch upper - conversation/CMMG
Replies: 4
Views: 4384

Short stroking with CMMG 16 inch upper - conversation/CMMG

I just hung up the phone with Brent at CMMG about my new 16 inch M4-style upper FTF issues with Rem 220 gr. subsonic. His bottom line recommendation is to change the buffer to an H3 or tungsten model that is heavier, to hold the bolt in battery a bit longer and increase the gas action that way. He a...
by Downrange
Wed Jul 25, 2012 11:51 am
Forum: CMMG
Topic: Short Stroking with the can in place. Any help appreciated
Replies: 9
Views: 8233

Re: Short Stroking with the can in place. Any help appreciat

I've got the same exact problem of FTF, short stroking, with subsonic rounds only in my new CMMG. Can you elaborate on the "adjustments" made, how done, etc?
I wasn't aware this had different gas settings, etc.

Seems a shame in a new upper made for 300 blk to have these issues.
by Downrange
Wed Jul 25, 2012 11:49 am
Forum: Silencer Discussion
Topic: New CMMG upper FTF issues...
Replies: 3
Views: 2001

Re: New CMMG upper FTF issues...

Thanks - didn't see the CMMG section!

Sorry for posting in wrong place.
by Downrange
Wed Jul 25, 2012 11:32 am
Forum: Silencer Discussion
Topic: New CMMG upper FTF issues...
Replies: 3
Views: 2001

New CMMG upper FTF issues...

I just acquired the CMMG upper, mated it with a CMMG lower (Multi-cal Mk IV), threaded on a YHM .30 cal can, and find the 220 gr Rem subsonic won't feed. Rarely chambers a new round, sometimes stovepipes, - also doesn't hold open after last round. Is it undergassed, or should I consider a lighter re...
by Downrange
Fri Jul 13, 2012 2:54 pm
Forum: Silencer Discussion
Topic: Anyone used a Silencerco Osprey on 300blk?
Replies: 24
Views: 10698

Re: Anyone used a Silencerco Osprey on 300blk?

Well, that's kind of what I was thinking. I'm surprised SilencerCo did not have a very large, prominent disclaimer that full power should not be used through the Ospreys. The BLK rounds look pretty much identical, and it would be really easy to "accidentally" mix them up... I think I'll ju...
by Downrange
Fri Jul 13, 2012 11:03 am
Forum: Silencer Discussion
Topic: Anyone used a Silencerco Osprey on 300blk?
Replies: 24
Views: 10698

Re: Anyone used a Silencerco Osprey on 300blk?

Fascinating...

I wonder what the max load the Osprey would really handle? Would it be damaged by the 147 grain supersonics? Or the Black Tip Barnes 110 gr. supers?

My upper is on order, and I cannot wait!