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Thread: AR feed malfunction

  1. #11
    Join Date
    Dec 2009
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    Utah
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    That definitely sounds like short stroking. Verify with a lock back check using full power ammo, then start looking for the leak/blockage .
    INSIDE PLAN OF BOX
    1. ROAD-RUNNER LIFTS GLASS OF WATER- PULLING UP MATCH
    2. MATCH SCRATCHES ON MATCH-BOX
    3. MATCH LIGHTS FUSE TO TNT
    4. BOOM!
    5. HA-HA!!

    -WILE E. COYOTE, AUTHOR OF "EVERYTHING I NEEDED TO KNOW IN LIFE, I LEARNED FROM GOLDBERG & MURPHY"

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  2. #12
    Join Date
    Mar 2012
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    Gas system - gas tube, carrier key, rings, receiver extension, spring, buffer

    even though it works with another BCG

    do lock back test - with a couple different mags - USGI and poly

    check to make sure gas tube is installed correctly into gas block

    shotgun upper and remove BCG and charging handle - see if BCG slides onto and off of gas tube, then do it with the charging handle in place

    inspect BCG - carrier key, use gravity test for rings

    check spring - a to insure it is the correct spring for the RE - carbine should be 10.5"

    reinstall buffer and spring, insert BCG and close 'er up, lock action to rear, let bolt go forward - does it go fully into battery - check by pressing forward on the concave portion of the BCG. If it didn't go into battery we need to figure that out

    Bring BCG slightly to rear with charging handle, insert index finger and gently ease the BCG forward, then press the charging handle all the way forward. Now, press the BCG all the way to the rear, you are feeling for any binding through out the carrier's rearward travel. At furthest rearward travel, press the bolt catch in and ease the bolt forward, check to make sure the BCG is retained to the rear by the bolt hear, not the carrier.

    Due to the fact that I want the thing to function whether it is dry or lubed - I wouldn't lube the BCG as much as I normally do use.

    That's all I got, if that doesn't drill down to what is wrong, I cross my hands over my man parts (outside the jeans) and look perplexed.
    "If I had asked people what they wanted, they would have said a faster horse." - Henry Ford

    “You are responsible for your actions, but the world doesn’t turn around you, so it’s important that you find something bigger than yourself to work for, a way for you to make a difference.” - Drew Dix, MOH VN '68

  3. #13
    Join Date
    Oct 2008
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    I had a gun shear a gas key screw once and turn into a single shot. I had a thread about it. The key appeared to still be on tight so I didn't think that was the issue but on the recommendation of Iraqgunz I checked the gas key screws more closely and using a Wheeler Fat Wrench to take the screws out determined that one had in fact sheared in half.

    I've also heard of popped primers getting stuck in the gas key and causing gas obstructions.

  4. #14
    Join Date
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    I'd check for gas block alignment and gap between gas block and shoulder on barrel (~.025"?) which accounts for handguard endcaps.
    Quote Originally Posted by Sigmund Freud View Post
    A fear of weapons is a sign of retarded sexual and emotional maturity.

  5. #15
    Join Date
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    Don't be surprised if it's the garbage WMD NiB carrier.



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