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mtrmn's Achievements

  1. OK. I don't see a way to edit my post above, but after taking time to READ THE ENTIRE THREAD I realize most of the problem with the buffer/retainer contact has already been taken care of. My apologies for not doing my homework. However, a quick fix would be to cut the buffer face if you have access to the equipment or know someone who does.
  2. Possibly true, but if the problem is the buffer contacting the retainer during operation the 2 available cures are in this thread:
  3. I'm very late to this party, but I got something to say anyway. When you lube that BCG it needs lube INSIDE where the gas rings are as well. I've found that a few drops in the exhaust ports on the side of the carrier every 10-20 rds or so works wonders during breakin.
  4. I liked my Glock 19 so much (and it's old, like gen 2 or some such) that it replaced a Detonics Mk VI combat Master 45 as my EDC. This was about 1990 or so. I added night sights and had 1 problem with the gun very early on. It fired when I pulled the trigger, then it would fire again when I let off the trigger. Sent it to Glock and it came back fixed. Don't know what was wrong. No problem since then.
  5. I would replace that. JMO I'm assuming this is a used gun? That particular part needs to be well lubed. Probably best with grease. I've replaced a few of those in AR15's and it made a difference in smoothness of movement when cycling by hand.
  6. Simple enough. Now I understand more about the reasons behind the round ejectors.
  7. I have seen this discussed on other forums and it seemed to be narrowed down, in at least one case, to be dependent on which side of the magazine the round came from. If firing from a full mag, rounds 1,3,5 had about the same POI and rounds 2,4, had a different POI. This possibility could be eliminated by only loading one rd in the mag at a time so that every shot originated from the same side of the mag. If the split grouping went away then that would be the likely cause. I don't know if or how the problem ever got fixed however.
  8. Tried a heavier bullet? Just a thought.
  9. Just need to add this: Make sure there's no tape between the buffer and the retainer. The retainer must contact the buffer and not the tape for this experiment/measurement to work.
  10. This is a good idea to be on the safe side. Tape on the face of the buffer to see if that's enough to make contact with the bolt carrier and push the buffer away from the retainer. Then you can measure the tape thickness to see how much you need to cut to break contact with the retainer. However, if you do cut the buffer unnecessarily it won't effect the gun's operation. I can use the cut down buffers in any AR15 I have, even those that don't need that modification, without any adverse effects.
  11. You're welcome. Pretty sure you are right and your problem was self-inflicted by mis-matching lowers and uppers. There are no standards between brands of the large frame ARs and by forcing the fit with a file you probably did move the upper too far forward. My remedy will allow it to work, and you can still use the same buffer next time you swap uppers. Maybe I should have patented this...🤔
  12. Looks like the annealing process on the case went awry.
  13. Read this thread for more solutions to this problem: ETA: screwing the buffer tube in more will not fix this. The hole for the buffer retainer would have to be re-located or the aforementioned offset retainer installed.
  14. PSA build. 16" Faxon pencil, .308, 1/10, "mid length" requiring 12 -1/16" gas tube. Kaw Valley 5.6 oz buffer with Sprinco orange spring. 0.093" gas port in a .750" journal.
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