Bolt action AR15!

Discussion in 'General Firearm Discussion' started by hotSAUCE, Jun 9, 2013.

  1. hotSAUCE

    hotSAUCE
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    I'm having (which I hope is something simple) an issue where the BCG isn't cycling.

    I have cleaned it and i have about 1000 rounds through it without a FTF or FTE.

    So i went to the range last month with a buddy and we shot my AR and first shot, BANG, second shot, CLICK. I rack the charge handle and brass ejects. Pull trigger, BANG, second shot, CLICK. I just replaced the charge handle to a BCM Mod4 so I assumed that was the cause. So I went to the range today and put the old charge handle back in and same results.

    It almost feels like there isn't enough pressure from the first round to cycle the BCG back far enough to catch the next round.


    I'm in the process of cleaning it all out again. Anything I should be looking for?

    *sorry if any of my terms are not correct, i'm still very new with AR's and the lingo...

    UPDATE: cleaned the cr*p out of the gun and noticed the Gas key is loose. Can I just tighten it back up or do I need to replaced anything? Also if I can just re-tighten them, do they need to be torqued to any certain lbs?
     
  2. wakejoe

    wakejoe
    Beaverton, OR
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    Torque spec is 35-40 inch pounds.

    Tighten them down and stake them. I would personally replace the key and the bolts with known-quality components, but you don't have to.
     
  3. Mr2000

    Mr2000
    Grants Pass, OR
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    Check your extractor. The fact that the trigger is reset tells me that the bolt is cycling but it's not ejecting the last round. Your extractor spring is probably too light. I had the same issue about a year ago with a colt/aero build I did. Gun would fire, and the trigger would reset but it would fail to eject the brass. I switched to my buddies BCG and the weapon operated fine. Once I replaced the extractor spring, the weapon functioned flawlessly.
     
  4. bellarum

    bellarum
    beaverton
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    +1 on the gas key being loose. At least tighten and stake the one you have. See if it runs.
     
  5. clearconscience

    clearconscience
    Vancouver, WA
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    In my limited experience it's probably a gas problem, short cycling or the extractor is bad.
    Also if it's been fired a lot clean the gas rod may be clogged with gunk.
     
  6. PuddleMonkey

    PuddleMonkey
    Vancouver, WA
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    it's probably your flux capacitor that's giving you problems
     
  7. hotSAUCE

    hotSAUCE
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    All fixed, Mcfly helped me out with it
     
  8. Caveman Jim

    Caveman Jim
    West of Oly
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    Well don't leave us hangin, what was it?
     
  9. hotSAUCE

    hotSAUCE
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    I will know for sure tomorrow but the gas key was extremely loose and has been tightened so we shall see
     
  10. Hardwood floor guy

    Hardwood floor guy
    Beaverton
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    another thing to check is remove the gas block and clean the little hole that goes into the barrel, I had an ar10 that did this to me and that's all it was. it was not getting enough gas pressure into the chamber to cycle the bolt fully.
     
  11. James 61

    James 61
    Clark Co Washington
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    Similar thing was happening to a friends AR. I went to pull the hand guards off to check the gas tube and the whole gas block slid forward about 3 inches. Once it was back in place and securely thightened the problem was resolved. Not necessarily your problem but something to check.
     
  12. matt_w

    matt_w
    Hillsboro, OR
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    either a major gas block leak, or a minor leak in combo with cheap steel ammo.
     
  13. hotSAUCE

    hotSAUCE
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    never used steel ammo. I have only ran Federal or PMC through it.

    The gas key was loose and the gun is at Rainer Arms currently
     
  14. DeanfromOregon

    DeanfromOregon
    Wilsonville
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    Congrats! You're California legal!
     
    Oklahomie and (deleted member) like this.
  15. shooter58

    shooter58
    Vancouver, WA
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    I have had 2 AR's over the years that short stroked due to loose gas keys. Tightening and staking solved the problems both times.
     
  16. hotSAUCE

    hotSAUCE
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    RA is loctight and staking my gas key

    They said it would be ready tomorrow. And a new free floating rail
     
  17. richardlpalmer

    richardlpalmer
    Kirkland, WA
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    It's interesting to see all the different responses. One thing that wasn't mentioned (or I missed it, if it was) was the magazine.

    I've had the same symptoms happen and it turned out to be the magazine. The spring is worn, it's dirty and the follower can't freely move, etc.
     

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