Mine is always third to the last round in the magazine. Nowhere else. My guess is that it is a timing of physics in a tolerance stack-up that is impossible to predict and characteristic to each individual firearm.Pretty much identical looking misfeeds.... I am pondering taking apart the MKG and taking down the burr below the feed ramp. I saved the last three rounds that were the misfeed rounds. All had fresh scrape marks along the nose of the round and into the casing. I am just baffled by the order of the misfeeds. Expected it to be a random event but there appears to be a pattern of sorts. 2nd or 10th round in mags one and two. Will let y'all know what happens next once I decide where to go with this.
Very interesting. Looking forward to your update!Ok, new up date and its looking good. Under the current set up, zero feeding failures after approximately 115 rounds through the three Glock 21 mags and the one SGM 24 rd mag. My current set up is I took all the weights out of the buffer to increase the bolt speed.
I purchased the CMMG tuning kit and was playing around with that for 50 or 60 rounds. As the weights increased the nose up misfeed increased, so I began going opposite and removed the tuning weights. Back to square one. Of the three Glock 21 mags, One mag would run flawless the other two nose up misdeeds on the 11th rd, consistently. The only other place to lose weight was in the buffer. SO I took out the buffer and removed the internal weights. The OEM buffer that came in my MKG weighed 3.3 oz. Running empty, not sure yet what the buffer alone weighs since I don’t have my scale with me…. But that appears to have done the trick. Since removing the buffer weights I have had NO nose up misfeeds or any other issues with the weapon. I will update in another day or two once I resupply on the ammo.
Sorry A63 buggy, I've got nothing for you. In all my looking yours is the first I have seen described with that kind of problem. I hope you are looking/posting in other forums as well (arfcom and the like). Best of luck to you working with CMMG (seriously, I mean it).
I've been down that road too. I was cleaning after every test session even if it was only 100 rounds. I was cleaning the magazines too. I even tried lubricating the internals of the mags with graphite.Update on my MkG… It’s better. So I began yesterdays session with a cleaned weapon and 300 rounds of 230 gr, FMJ. Buffer had no weights in it and buffer spring is OEM. Through the first 260 rds only Mag2 had nose up misfeeds regardless of order fired. Misfeed was always on 11th rnd. When mis feed occured I would load 2 more rds for a total of 5 rds in mag and finish the cycle. Mag2 would finish cycle with out misfeed. So I figure that Mag2 will be removed from use after this evolution. Then came the last cycle with all three Mags. All had nose up mis feeds on 11th rnd and I was finished with my 300 rds.
The last cycle I am going to attribute to dirty weapon with some reservations. It was only 300 rnds fired from a clean MkG. The ammo used was a mix 200 Sellier&Bellot and 100 Blazer. The Blazer ammo had some soot like residue that was on my bench and pant leg. I used the Blazer in the last 100 rds.
So Iam leaning towards the Blazer ammo as part of the issue with the odd soot residue on my bench. The soot was a black, flakey material that came out of the ejection port when casing was ejected.
My other “issue” is that after 260 rnds all mags had mis feeds. If this is a thing with this CMMG MkG, then it is the only weapon I have that needs a cleaning after every 260 rnds fired.
I will be scratching my head another week and still no response from CMMG.
So in another week or so after I run the experience through the gray matter and some after action analysis I will try again with a clean weapon and single brand of ammo.
My CMMG was originally marketed as a "Guard". At some point it was also an MKG. The Banshee name came later. I originally purchased mine as a complete firearm in mid to late 2018 if I remember correctly.Gringo, Karl,
when did you guys receive your CMMG 45 barrel and bolts?
I only just recently received mine after a long period of no one having them in stock. Perhaps they tweaked something when they made the recent production run. After next weeks range day I’ll be tearing it down for some cosmetic things and handguard swapping. I’ll have barrel off to take clear pictures of ramp to try and compare with what Karl dremmeled.
side note thought I’d looked thru those other boards for similar threads. Off to look again. Also same problem. Totally ignored by CMMG non existent customer service. Not a peep.
Rick
I thought I posted a reply last week.... okGringo, Karl,
when did you guys receive your CMMG 45 barrel and bolts?
I only just recently received mine after a long period of no one having them in stock. Perhaps they tweaked something when they made the recent production run. After next weeks range day I’ll be tearing it down for some cosmetic things and handguard swapping. I’ll have barrel off to take clear pictures of ramp to try and compare with what Karl dremmeled.
side note thought I’d looked thru those other boards for similar threads. Off to look again. Also same problem. Totally ignored by CMMG non existent customer service. Not a peep.
Rick
I asked them a similar question since I was doing a lot of troubleshooting for them. The answer was "No".I wonder if CMMG at a minimum would reimburse me for the ammo used to find this "fix" since they have been radio silent and email silent through this whole process? Pipe dream right.....