Broke my AR Bolt today!

Discussion in 'AR-15 Discussion' started by Tackleberry1, Apr 23, 2012.

  1. Tackleberry1

    Tackleberry1 New Member

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    This is a new one for me guys. 6 years of Infantry service and 10 + years of AR shooting, I've never seen a bolt lug break off...Let alone 2!:eek:

    Factory new ammo in an upper receiver built by J&S out of Olympia WA.

    The Bolt Carries is stamped WIB

    Anyone seen this before or know what could have caused it?

    I was using a brass catcher to keep from pelting the guys to my right so I know there were no case blow outs of any kind. It's like the lugs on both sides of the extractor just broke off?

    Feedback...Please.

    TACK
     

    Attached Files:

  2. goretro77

    goretro77 New Member

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    note to self: never buy a upper receiver built by J&S out of Olympia WA.
     

  3. BenLuby

    BenLuby New Member

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    How old is the BCG? Actually have a DVD from Bravo Company about AR's, and one of the things that he discusses is that exact problem, but it is usually only seen, from what I understand, in high round count BCG's that are rode hard and put up wet. And even then it's uncommon.
     
  4. Tackleberry1

    Tackleberry1 New Member

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    Overall the UR is fine, in fact it's a Tack Driver. I'm sure outsource the bolts but I've never heard of WIB?
     
  5. jordan89

    jordan89 New Member

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    Now I hate to show my stupidity here, but what do you mean by put up wet?
     
  6. Tackleberry1

    Tackleberry1 New Member

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    Bought the complete upper w/bolt & carrier group about 2 years ago. No more than 300 rounds through it.

    Tack
     
  7. canebrake

    canebrake New Member

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    ^ Not cleaned.



    Tack, are you sure there wasn't a casing bounce back from the brass catcher that may have been the culprit?

    Did you find the broken lugs?
     
  8. BenLuby

    BenLuby New Member

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    Someone who knows old slang. Good. I was wondering about a brass catcher as well. I don't really like those things.
     
  9. Tackleberry1

    Tackleberry1 New Member

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    No bounce back, not possible, our range brass catchers are 2'x2' net covered boxes sitting 18" to the side of the rifle and the netting is loose. The brass drops straight down the net.

    Yes, both lugs were in the chamber. 1 had to be "rodded" out of the chamber, the other was sitting loosely in the locking lug rotational area just forward of the chamber and "shook" out. You can see them both next to the bolt in the pics above.

    Tack
     
  10. jordan89

    jordan89 New Member

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    Thank you. I figured it was something like that but just wanted to make sure.
     
  11. robocop10mm

    robocop10mm Lifetime Supporting Member Lifetime Supporter

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  12. BenLuby

    BenLuby New Member

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    What I've found out from a few other sites is, it seems to be made by WilTec Industries for Del-Ton. Haven't heard of any other's losing their teeth.
     
  13. Snakedriver

    Snakedriver New Member

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    Uh-Oh, time to get a new bolt assembly. That's just sad to see!

    BCM and Spikes have some good ones. $200 should do the deal. It should just drop right in.

    Any hope of a Warranty claim? I'm not sure I'd take a replacement that is just more of the same product though after seeing that.
     
  14. jeepejeep

    jeepejeep New Member

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    The saying "Rode hard and put up wet" actually refers to horses that haven't been cared for properly. If you ride a horse hard and he sweats a lot you are supposed to walk it around and cool off and dry it off before you put it back in the barn or wherever. It's a very old saying.
    As applies to guns, yes it means shot a lot and put away without being cared for. You can use the term for almost anything that isn't cared for properly.
     
  15. Duck4Glocks

    Duck4Glocks New Member

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    Could be a manufacture defect on either the chamber or the bolt. If two different bolts broke I might have a gun smith look at the chamber with another bolt and see if it hangs up anywhere in the chamber.
     
  16. Tackleberry1

    Tackleberry1 New Member

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    What's MP?

    I googled "broken WIB bolt" and found an old thread at AR15.com describing the exact same thing. The thread indicated a bad batch that were poorly heat treated hitting the market about 2 to 3 years ago. I suspect my builder, J&S, got some of these and unknowingly resold them to customers.

    I emailed J&S yesterday and hope to hear back today. We will see what they have to say.

    I'm more concerned about possible chamber damage because one of the teeth somehow got forward of the next round and locked up that round in the chamber. This prevented it from going into battery, firing, and possibly causing a catastrophic failure had the tooth popped forward into the riffeled area but the extracted live round was pretty bent up telling me there was quite a bit of force on that broken tooth as it sat in the chamber.

    I'm hoping to drop the whole upper off at J&S to have it checked out as it used to shoot .5 MOA. Hopefully there's no chamber damage and I can simply replace the bolt.

    Tack
     
  17. Jpyle

    Jpyle New Member

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    MP = MPI, magnetic particle inspection. Checks metal parts for voids and micro fractures that could lead to a failure such as yours.
     
  18. Jpyle

    Jpyle New Member

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    Any primer penetrations or other indications of out of spec head spacing? Is the bolt head fused to the carrier or binding in any way that would prevent unlocking? Short of anything else mechanic with the bolt and it's cycling I would suggest it was just a defective bolt head that gave way at it's weakest, unsupported point around the extractor.
     
  19. Tackleberry1

    Tackleberry1 New Member

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    WilTec

    I googled WilTec and found a heavy industrial machine fabricator. I contacted them with a full description of the problem and offered photos if someone will return my communication. We will see what happens.

    Tack
     
  20. Tackleberry1

    Tackleberry1 New Member

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    I checked all the spent brass and found no irregularities. Only the live round that failed to chamber had any damage. No binding with carrier either and I doubt there was any head space issues. This upper held consistent .5 MOA groups before the incident. I'm becoming convinced that it's defective bolt, not properly heat treated.

    Called J&S but there closed on Monday. Hope to bear from them tomorrow.

    Tack