Page 4 of 5 FirstFirst ... 2345 LastLast
Results 31 to 40 of 49

Thread: Help - Weird New Double Feed LMT

  1. #31
    Join Date
    Mar 2017
    Posts
    669
    Feedback Score
    2 (100%)
    Quote Originally Posted by M Sadler View Post
    An entire case of Okay magazines bad? I personally doubt it, but if that was your experience who am I to argue.
    They did it to three shooters in 5 different Colts that were and are 100% with the other mags.

    The whole case was the same date code/lot. Swapped it out for the same quantity of Gen M3s, GTG for almost two years.

  2. #32
    Join Date
    Nov 2016
    Posts
    37
    Feedback Score
    0
    Any update on the troubleshooting?

  3. #33
    Join Date
    Jan 2015
    Location
    East of Atlanta
    Posts
    495
    Feedback Score
    0
    I “upgraded” to a LMT enhanced bolt in one of my rifles and started getting the same malfunction you’re experiencing. I “downgraded” back to the Sionics bolt and the malfunction went away. I tried the bolt in 2 other rifles and they did the same thing. Now I have a $200 superdupermalfunctioninducinghunkofshitthatsitsinthepartspile. Lol.

    It’s pretty though.
    Last edited by Jsp10477; 02-24-20 at 19:10.
    I prefer dangerous freedom over peaceful slavery. Thomas Jefferson.

  4. #34
    Join Date
    Feb 2019
    Posts
    82
    Feedback Score
    1 (100%)
    Update:
    No failures through several hundred rounds today. Only change was pistol grip tightened and back to H2 buffer. Loose grip was for sure causing the issue.

  5. #35
    Join Date
    Nov 2010
    Location
    Indy
    Posts
    143
    Feedback Score
    0
    Quote Originally Posted by Hox013 View Post
    Update:
    No failures through several hundred rounds today. Only change was pistol grip tightened and back to H2 buffer. Loose grip was for sure causing the issue.
    You don't even need a grip to fire the gun so I don't see how that was the cause.

    Temperature + moisture build up on ammo (freezing and sticking together) + faulty ammo maybe (case diameter), buffer (bolt speed) = perfect storm maybe?

  6. #36
    Join Date
    Feb 2019
    Posts
    82
    Feedback Score
    1 (100%)
    Nope. I've been there done that with it no problems in the past. And the malfunction didn't appear to be action related, it appeared to be mag related. It starts malfunctioning every mag when the grip is loose, then goes away when the grip is tight? Hmm... best we were able to figure is that with a loose grip and the added back pressure of the suppressor, the gun was physically shifting rearward forcefully enough to jar the round from the mag loose, which then caused the bolt to hang up on it when the next round was attempting to feed. Now with a perfect shoulder purchase, perhaps the gun doesnt malfunction because recoil is then independent of the grip. However when testing the gun with what rounds I had left last trip I wasnt focusing on it, so only way to test would be loosen the grip again. I'll pass on that since I've applied loctite. Not even a shadow of a doubt in my mind that the grip was the issue.

  7. #37
    Join Date
    Mar 2017
    Posts
    669
    Feedback Score
    2 (100%)
    Wow. Sounds like the gun is on the ragged edge of reliability. I always verify function with no shoulder purchase to ensure the gun works no matter how it's being fired.

    I sometimes use a couple wraps of teflon tape on the grip screw to make sure they stay tight.

  8. #38
    Join Date
    Feb 2019
    Posts
    82
    Feedback Score
    1 (100%)
    No it works fine not shouldered when the grip is properly secured, because the pistol grips allows you to absorb that recoil. Again, it's not an action problem, it's a magazine problem. The only contributing factor from the rifle is a loose grip. With nothing to stop or absorb the recoil (loose grip AND poor shoulder weld) the magazine is jolted and spits the front of the round upward. The same as when someone inserts a full magazine on an open bolt hard enough to dislodge a round. This rifle has run thousands of rounds in varying condition (-10F and ice to 100F and rain) with sparse cleaning. It's far from the ragged edge orf reliability, which is why my ejection patterns never changed even when the malfunctions occurred.

  9. #39
    Join Date
    Mar 2017
    Posts
    669
    Feedback Score
    2 (100%)
    I tried to replicate this with a bone stock 6920, NHMTG 30 round mag w/Magpul follower, M855 ammo.

    I held the gun with no contact with the grip, pulled the trigger with my thumb so that there was as close to nothing as I could get to counteract the recoil.

    All 30 rounds ejected with the same pattern and distance as when firmly shouldered, bolt locked back on empty.

    I loosened the grip screw 5 turns and repeated the first test, then shot another mag of double taps, various positions. Same ejection and lock back as the first two mags.

  10. #40
    Join Date
    Feb 2019
    Posts
    82
    Feedback Score
    1 (100%)
    Quote Originally Posted by 17K View Post
    I tried to replicate this with a bone stock 6920, NHMTG 30 round mag w/Magpul follower, M855 ammo.

    I held the gun with no contact with the grip, pulled the trigger with my thumb so that there was as close to nothing as I could get to counteract the recoil.

    All 30 rounds ejected with the same pattern and distance as when firmly shouldered, bolt locked back on empty.

    I loosened the grip screw 5 turns and repeated the first test, then shot another mag of double taps, various positions. Same ejection and lock back as the first two mags.
    Did you do it suppressed?

Page 4 of 5 FirstFirst ... 2345 LastLast

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •