Quantcast
  1. This site uses cookies. By continuing to use this site, you are agreeing to our use of cookies. Learn More.

AR 15 problem

Discussion in 'Gunsmithing and Repairs' started by bhsmith73, Jan 20, 2012.

Thread Status:
Not open for further replies.
  1. bhsmith73

    bhsmith73 Member

    Joined:
    Jan 20, 2012
    Messages:
    1
    I recently completed my first AR build using all spikes tactical components. Took it to the range today for the first time and ran into some issues and was wondering if anyone has a idea as to what a solution may be. It ran the first clip through fine then around the 25th 30th round it would fire the first round and then fail to fire the next chambered round. I tried two different kinds of ammo ( American Eagle and PMC) both with the same result. Each time when I ejected the unfired round , the primer would be dimpled but obviously wouldn't fire...

    I know this may be vague but any help or advice anyone could offer would be appreciated..
     
  2. Mac's Precision

    Mac's Precision Member

    Joined:
    Jul 22, 2010
    Messages:
    301
    Location:
    Bellingham, WA
    Check your basics.

    Compare the primer dent of fired rounds to the dent in unfired rounds. Are the fired dents MUCH deeper indicating positive ignition as opposed to shallow taps on the unfired cases?

    Check for firing pin freedom of movement. Examine the firing pin hole in the bolt and assure there is adequate clearance for the pin to freely move through.

    Check firing pin protrusion.

    Check headspace.

    Check hammer travel and freedom of movement.

    What brand / weight springs did you use in the lower?

    What trigger group components?

    What firing pin?
     
  3. dprice3844444

    dprice3844444 member

    Joined:
    Feb 26, 2011
    Messages:
    4,264
    Location:
    se fla i love claymores 01/sot
    check for crud/burrs inside the bolt face
     
  4. CCW1911

    CCW1911 Member

    Joined:
    Jun 28, 2003
    Messages:
    107
    Location:
    Arkansas
    Does the hammer fall when you pull the trigger or is it not cocked?
     
  5. JohnnyBlu

    JohnnyBlu Member

    Joined:
    Dec 17, 2011
    Messages:
    1
    I think CCW might be onto it. Sounds like the disconnector might not be working and the hammer following the bolt down.
     
  6. rbernie
    • Contributing Member

    rbernie Member

    Joined:
    Jan 21, 2004
    Messages:
    20,450
    Location:
    Norra Texas
    Is the spent case always ejected?
     
  7. weeniewawa

    weeniewawa Member

    Joined:
    Jul 20, 2007
    Messages:
    117
    Location:
    Central **********
    check the unfired rounds in another rifle

    they may not be sized right and the bolt can not go into battery, hence the firing pin not reaching the primer
     
  8. downingducksdowneast

    downingducksdowneast Member

    Joined:
    Nov 11, 2009
    Messages:
    31
    This same thing happened to me (dimpled primer but no bang) and I found I had installed the hammer spring backwards, enough force to dimple but not to go boom. if you do a google search for "ar15 hammer spring backwards" you will get a bunch of posts from ar15 dot com about it with some pictures. My trigger pin also worked out because of it. as soon as I switched the spring around I had no issues.
     
  9. madcratebuilder

    madcratebuilder Member

    Joined:
    Jul 15, 2007
    Messages:
    5,020
    Location:
    Northern Orygun
    First thing to do is check the hammer spring. Fairly common on first time builds.

    Legs over the top.
    [​IMG]
     
Thread Status:
Not open for further replies.

Share This Page