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Genuine question about AR jams

Discussion in 'Black Rifle Forum' started by jetdefiant, Feb 4, 2010.

  1. jetdefiant

    jetdefiant

    710
    0
    Nov 16, 2008
    So I was thinking, there is the never ending debate about reliability of the AR platform and some claim that they are prone to jamming if dirty while others never have an issue.

    This thread will NOT be a vs. thread!

    My question is, for those people who have experienced jams. Most of the jam types that I have seen look quite easy to clear, like double feed, failure to fire, etc. These types of malfunctions seem to be easy to fix and get back into the fight. So my question is what kind of jams have you experienced that permanently took your AR out of commision (hopefully at the range and not in action).
     
  2. Hedo1

    Hedo1

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    Oct 1, 2007
    SE Pennsylvania
    I have had a failure to extract due to an out of spec case that I handloaded. It wedged itself into the bore and I had to pull it out with a multi tool after breaking the rifle down.

    Otherwise a few double feeds.

    I find the AR platform pretty reliable. Keep mine pretty clean. I field strip it every 500-700 rounds.
     

  3. TimP

    TimP 1 Proud Infidel

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    Jan 17, 2003
    NC
    I have seen a few round over bolt jams which take the gun down immediately. Then the only other type I have seen is where the extractor pulls the rim off the case and you have to knock out the spent case with a cleaning rod.
     
  4. mavrick

    mavrick

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    Apr 2, 2000
    southeastern Pa.
    I agree.. those are two malfunctions that I've seen take a rifle off the line.. brass over bolt jam and spent cases that have to me manually removed..

    mavrick
     
  5. jetdefiant

    jetdefiant

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    Nov 16, 2008
    Could someone explain the brass over bolt term? that's actually the first time I've heard of it.
     
  6. mavrick

    mavrick

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    Apr 2, 2000
    southeastern Pa.
    Brass over bolt is sort of a generic name to describe a malfunction called a bolt over-ride. In a nutshell what happens is a live round, or a piece of spent brass gets jammed up in the charging handle channel, above the bolt face, which usually results in the bolt being jammed to where it will no longer operate.

    mavrick
     
  7. JBJ16

    JBJ16

    744
    2
    May 9, 2007
    YOUR BLINDSIDE
    Suppose you were in a firefight, sandy, dirt environment then someone strafes with automatic fire and you are forced to dive for cover unfortunately you land with your rifle right-side (ejection port side) into the dirt when diving for cover. Ejection port cover is wide open at that moment.

    IMHO this video may simulate the above scenario . . . you may or may not agree.
    http://www.youtube.com/watch?v=CqRwx4wtmms

    Oooops, sorry OP was asking about AR jams.
     
  8. K. Foster

    K. Foster

    2,601
    509
    Feb 19, 2002
    Mo.
    Excellent description.
    To clear this, you may be able to move the bolt to the rear with your thumb or the corner of a magazine. It is easier to pry the bolt back with a multi-tool or the spine of a fixed bladed knife. This is one reason I always have a Ka-Bar TDI on my chest harness.
    I’ve seen this malfunction occur several times but never with quality mags.
     
  9. thisaway

    thisaway Moderator

    1,580
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    Jan 11, 2000
    Soddy Daisy, Tenn.
    I was using some 1970s-vintage 5.56 ammo in a .223-chambered AR and had a round stick in the chamber. When the charging handle was retracted, the case came out, leaving the bullet behind, stuck in the rifling. All the powder spilled out of the case into tha action and lower receiver. I had to dismantle the rifle and use a cleaning rod through the bore to knock the stuck bullet out, then use aerosol gun cleaner to clean all the spilled powder out of the rifle.
     
  10. faawrenchbndr

    faawrenchbndr DirtyThirty fan CLM

    36,273
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    Nov 24, 2005
    Troy
    What if you land on the other side, no dirt gets in, but,
    just then a C130 crash lands into your fox hole? :dunno:
     
  11. NeverMore1701

    NeverMore1701 Fear no Evil Platinum Member

    39,165
    4,726
    Jun 25, 2004
    Amarillo, Tx
    Well, if there happens to be a treadmill nearby, you'll be fine, as everyone knows it would counteract all motion made by the plane.
     
  12. RMTactical

    RMTactical www.AR15pro.net CLM

    12,603
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    Oct 7, 2000
    Behind an AR-15
    AR15's are very easy to maintain. People who struggle with them don't tend to be very gun savvy in my experience, or they have a poor quality AR15.

    Buy a quality gun and keep it well lubed and you will be happy.
     
  13. AK_Stick

    AK_Stick AAAMAD

    17,689
    1,392
    Jan 20, 2004
    Alaska, again (for now)

    The only failure I've seen completely dead line a gun, that was not the shooters fault (i.e. bad reloads) was a broken bolt. And that happens if you shoot enough, but is fairly uncommon.

    Most common is a double feed, or sticking in a dirty chamber.
     
  14. RWBlue

    RWBlue Mr. CISSP, CISA CLM

    23,551
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    Jan 24, 2004
    Currently have a Wolf steel case stuck in one of my ARs. I don't have the full story at this point, but the casing is not coming out. The extractor slipped over the casing, but that is not the problem.

    I was blowing out primers with a certain reload, on a hot day. Those primers would find their way to interesting locations. I don't think I ever had a FTFeed, or FTExtract, but I know I had a FTFire and a FTLoad.

    I saw a kaboom with Georgia Arms ammo one day. It blew the guts out of the mag. It locked up the gun. I told the guy to take it to a smith to remove the barrel.... I don't know the outcome.

    My subsonic reloads did interesting things. If there is a way to lock up an AR, this is the load to use.

    One more item, a made a new build, I had new mags, there were failures to load. Once I broke the mags in, by using them one or two time, all the mags worked better.
     
    Last edited: Feb 4, 2010
  15. kgain673

    kgain673

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    Oct 8, 2007
    glen burnie, MD
    I've had more jams out of my AK variant then my AR builds. Just had to add my two cents.
     
  16. The only failures I had were either magazine-related (sold them to a friend, they worked perfectly for him:dunno:) or something that turned my rifle into a self-ejecting straight pull, put in the old buffer and it went away.
     
  17. RWBlue

    RWBlue Mr. CISSP, CISA CLM

    23,551
    847
    Jan 24, 2004
    One more
    Federal premium match 223 didn't have enough power to cycle one AR. I think most would, eject, but...
     
  18. JBJ16

    JBJ16

    744
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    May 9, 2007
    YOUR BLINDSIDE
    Then you can spread your legs apart, bend forward and kiss your a** goodbye:tongueout:
     
  19. Kentak

    Kentak

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    Jan 8, 2006
    Central Ohio
    I had some various types of failures early on with my Bushmaster Patrolman's Carbine. The worst jam was from a loose primer than froze the action so badly I sent it to Bushy for the fix.

    For whatever reason, those early problems quickly faded away, and it's been great. Probably, new gun break-in syndrome. I've learned to stay away from weird ammo, I don't shoot steel case, and I run it wetter than I used to. My experience has been that consistent lube is more important than spotless clean.
     
  20. LEAD

    LEAD

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    Jan 9, 2009
    VT
    So on topic, what jams have you had with your ARs