I guess I am just stuck on a buffer stamped "H" being 4.635oz. That is H2 range in AR-15 world.
Thanks sloppyjoe, I appreciate your offer. I'm gonna have to mull this around for a while to figure out where I want to go with this.
My buddy is digging out some extra parts for me now.
For reference, the buffer and spring diameter are smaller in S&W ARs...FWIW.
Update:CMMG has returned my 45 Banshee, notes:
Add action tuning kit medium weight (2oz) installed.
Flex honed chamber.
I've not taken it out to test it yet, work travel getting in the way. Hopefully soon.
Excellent details. And as much as it may bother you that it's not a perfect looking job when you break it down to look at it, with all the trouble it has given you, I'd leave it now as long as it is working. Making it look better just might introduce another variable. Working in this case = perfect IMO.Finally had a day for cleaning with some decent sunshine for photos. I didn't think of doing a before/after set for the grinding. I am looking forward to getting it out again soon to continue testing, but my employer is making plans for me that will make that difficult in the near-term.
With the excellent lighting and magnification it looks like I could have done a better job feathering the right-hand side.
The area of concern is above the yellow "smiley":
View attachment 168201
Sorry to hear about your issues. We ain't the only ones friend.Last August 2021 received my CMMG Banshee MkG 45ACP, 5" barrel. I have the same feeding issues as KJK is describing. The feeding issue happens around the 8th or 10th round in the Glock 21 (13 rd) mags. Next week or so I plan on taking the Banshee out and photo doc the feeding failures and do a round count of where in the 13 rd stack they occur. Another issue is that the bolt usually does not lock back after the last round fired.
So I am trying to Sherlock Holmes this between the buffer, magazines, feed ramp, or it is all a conspiracy and they are all in on it. Ruled out ammo since it has malfunctioned regardless what 230 gr ammo I run through it.
I did take out the buffer and weighed it... 3.3 oz. Contemplating maybe an heavier buffer but undecided until I get to the range a few more times to feel it out a bit more.
Plan on looking over the feed ramp area like KJK, to see if there are any rough edges buff them out if necessary.
I did write CMMG about a month ago and waiting for reply. Unfortunately right now I basically have a $1600 paperweight.
Your nose-up failure is what I was consistently seeing with my misfeeds. I can honestly say it looks like I could have taken that picture.Here is a photo I took a week or so ago. I noticed a burr just below the feed ramp and a color blemish which I believe is a corner piece nicked off the lug. I believe the burr may be part of the problem more so than the nick in the lug.
I did take the MKG to the range today and no joy. After shooting with the OEM buffer for three rotations I swapped out to a heavier buffer but that made it worse. Switched back to the OEM buffer and the wheels fell off the wagon. All mags had feeding issues. Multiple failures per mag. I decided to stop before I got too frustrated.
OMG buffer is 3.3 oz and test buffer is 4.6 oz. My feed issues varied from magazine to magazine. I am only using three Glock 21, 13 round mags. each had feeding issues. Mag 1 and 2 had issues at round 2 and at round 10 or 11. Mag 3 went flawless in all three rotations. Only issue with mag3 was it did not lock back on last round in last rotation