The carrier can also catch the rim, if the bolt misses it. This leads to something like the picture
Sent from my XT1565 using Tapatalk
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The carrier can also catch the rim, if the bolt misses it. This leads to something like the picture
Sent from my XT1565 using Tapatalk
Update: 1/28/18
Took the rifle out today.
Un-suppressed shooting Federal XM193, and Hornady Black 5.56 62gr ammo: H2 buffer, BCM extractor upgrade, gun functions perfectly, bolt locks back after every round, ejection kicks brass out at 3 o' clock. With the H3 buffer all of the above is still true, but ejection is slightly weaker, but still lands at about 3 o' clock.
Suppressed: H3 buffer/BCM extractor. Got excited that the issues may be resolved and i grabbed the wrong magazine loaded w/Federal XM193 55gr, first round fired and ejected fine. Second round blew a primer, and the extractor ripped the rim off the case which is now stuck in the chamber. DAMNIT!
Ordered an LMT-E full auto carrier, now to go get some rods and try to pound the stuck case out of the chamber from the muzzle side.
Getting to the point that im not sure a suppressor is worth taking out of the safe anymore.
Dude, you need an adjustable gas block. It really is the "easy button" solution to your issue.
Once again, I will reiterate. I believe your issue is the ammo. Get a 5.56 ruptured case extractor and try that first. https://www.brownells.com/gunsmith-t...prod23311.aspx
^^ This seems the most likely root cause and solution, while any overly hot ammo will exacerbate the problem.
-story time-
A long time ago, in a workshop not so far away, we worked on a severely overgassed 16" middy with a .223 Wylde chamber.
It was 50% overgassed with a .093" port.
Yes, the maker put a rifle port in a middy barrel, even though everybody knows middys should have a .076" port. ;-)
Interestingly, suppressors can also add up to 50% extra gas drive, depending on a bunch of things.
Anyhow, it would only run with mild 223 ppu ammo.
It happened to have an upgraded extractor spring from the get go.
It would rip the soft rims off wolf steel case, leaving a suck case with a missing chunck of rim.
It would mangle the brass rim and blow every other primer out of federal XM193, which would of course work their way down into the FCG and lock up the whole works.
No amount of heavy buffers or springs could tame it.
But a prototype gas port insert worked and allowed it to run any ammo without worry.
That barrel still runs nicely today ( although it wears an intermediate gas system now ).
Just asking, I'm here to learn
If excessive gas is the root cause why wouldn't a adjustable gas block be the solution?
I posted my shooting results in the other 13.7 middy thread, but not sure if you saw it. I failed to mention that I'm also running an LMT Enhance carrier and bolt, and the Sprinco Green and A5H2 buffer are housed in an LMT rifle length tube. There are no adjustable gas regulation systems in the carbine.