AR Problem - Help me! :)
Results 1 to 7 of 7

Thread: AR Problem - Help me! :)

  1. #1
    Join Date
    Dec 2007
    Location
    Greenville, SC
    Posts
    339

    AR Problem - Help me! :)

    OK, I just finished my AR last week - have not had a chance to shoot it yet, but in my fondling, I noticed a big problem. I will say this first - I purchased a complete lower, and complete upper - only "assembly was putting the two together.

    So the problem: I pull the charging handle back, let it go, and the bolt doesn't go all the way forward. It stops about 1/2" from where it should be. After investigation, I found that the Buffer Retainer Pin was not staying down, and was getting caught on the bolt. I had to pull both take down pins to get the thing apart - it wasn't going anywhere...

    Does anyone know why this is happening? I've double checked every part on that lower, and everything looks right, but I can't seem to figure out why this one pin is hanging up?





    Any help would be greatly appreciated!
    My Website: Nerd with a .45

  2.   
  3. who made the upper and who made the lower?
    What kind of fit do they have ?

  4. #3
    Join Date
    Oct 2007
    Location
    Tampa Bay Area
    Posts
    1,854
    I'm going to look at mine when I get home but is there a burr on the bolt carrier that the pin maybe catching?
    "When Government fears the people, it's liberty. When people fear the Government, it's tyranny."
    - Benjamin Franklin

  5. #4
    Join Date
    Oct 2007
    Location
    Tampa Bay Area
    Posts
    1,854
    Actually are you sure it's hanging on the buffer tub pin?

    Try this take:
    Take the upper receiver and insert the bolt carrier group. Slowly push the bolt carrier forward. You should not feel it snag and it should take very little pressure for the bolt to engage the chamber. I can actually hold my upper at a 45 deg angle and the bolt will slide closed by itself.

    You may have a burr in the upper receiver or more likely the gas tube is slightly out of alignment. Either could cause your issue.
    "When Government fears the people, it's liberty. When people fear the Government, it's tyranny."
    - Benjamin Franklin

  6. #5
    Join Date
    Sep 2007
    Location
    Gray Court, SC
    Posts
    2,934
    That's my first guess, the gas key is not lining up with the gas tube. Look and see if the key or the tube has a smiley on it. If it's not lining up take a big screwdriver and bend the gas tube enough to line them up. The gas key should slide over the gas tube easily.
    USAF Retired, CATM, SC CWP, NH NR CWP, NRA Benefactor
    To preserve liberty, it is essential that the whole body of people always possess arms, and be taught alike, especially when young, how to use them... -- Richard Henry Lee, 1787

  7. #6
    Join Date
    Dec 2007
    Location
    Greenville, SC
    Posts
    339
    Thanks everyone for the input! Come to find out, the idiot that put my lower together (purchased already assembled) didn't screw in the buffer tube in far enough to hold down the buffer retainer pin, so it was popping out. Tightened up two turns, and all's good in Danno's AR world now :)
    My Website: Nerd with a .45

  8. #7
    DPMS let a BUNCH of buffer retainer pins out on the market that were too tall a few years back,
    And I STILL run into them once in a while!

    Glad to hear it was your buffer tube.
    Makes for a quick fix when it's just adjustments!

Tags for this Thread

Posting Permissions

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