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Thread: Preventative Maintenance Schedule

  1. #1
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    Preventative Maintenance Schedule

    Gentlemen

    I have looked around but have not been able to find a PM schedule for the AR-15 rifle. What would be nice to have is a listing of common wear parts along with a round count recommendation for replacement. (Similar to manufacturing equipment manuals)

    Can anyone point me towards such a resource?

    Thanks in advance.

    CH

  2. #2
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    I've seen

    5,000
    Extractor spring
    Extractor insert
    Gas rings
    Action Spring

    10,000
    Replace bolt

  3. #3
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    There is no real way to measure this. That is because of various factors such as manufacturing, quality control, etc.. etc.. Here are a few things that I will recommend.

    1. Perform a check of your gas rings after all cleaning periods. Some people say it is necessary to clean all the time. However, along with cleaning goes inspecting the weapon for wear or potential damage, etc...

    2. Maintain a logbook.

    3. Consider changing your gas tube at least once a year.

    4. Keep a spare extractor assembly or two on hand as well as the spring and insert.

    5. As for your buffer spring. The TM has the acceptable limits for both the carbine and rifle springs listed. If you have been shooting alot then measure them at the next cleaning cycle. When it gets with a 1/4" or so of the limit replace it.



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    Iraqgunz,

    What's involved in changing out a gas tube? Can it be done in place, without removing barrel, etc. ?

    Thanks

  5. #5
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    Quote Originally Posted by andy t View Post
    What's involved in changing out a gas tube? Can it be done in place, without removing barrel, etc. ?
    I'm not IG, but it's a simple process. Just remove the handguards, tap out the retaining roll pin in the gas block/FSB, push the tube into the upper receiver until it clears the gas block and pull it out. Reverse the procedure to install.
    Last edited by DRich; 06-05-09 at 21:21.

  6. #6
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    You got it.

    Quote Originally Posted by DRich View Post
    I'm not IG, but it's a simple process. Just remove the handguards, tap out the retaining roll pin in the gas block/FSB, push the tube into the upper receiver until it clears the gas block and pull it out. Reverse the procedure to install.



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  7. #7
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    why do you change the gas tube??
    www.cpra.ph
    Cebu Pistol and Rifle Association

  8. #8
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    Because gas tubes can get clogged up with carbon. The TM actually calls for soaking gas tubes in a chemical that will more than likely make your penis fall off and is probably more expensive than just replacing it. I think the .MIL cost is about 7.00 on a carbine gas tube.

    Quote Originally Posted by lanceriley View Post
    why do you change the gas tube??
    Last edited by Iraqgunz; 06-09-09 at 11:16.



    Owner/Instructor at Semper Paratus Arms

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    Quote Originally Posted by Iraqgunz View Post
    Because gas tubes can get clogged up with carbon. The TM actually calls for soaking gas tubes in a chemical that will more than likely make your penis fall of and is probably more expensive than just replacing it. I think the .MIL cost is about 7.00 on a carbine gas tube.
    hahaha.. that's pretty funny. how many rounds do you get to do that?? coz i've never really reached the point that I needed to clean or replace the gas tube.

    is there a noticeable difference in shooting when the gas tube is dirty?
    www.cpra.ph
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  10. #10
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    A couple of thoughts.

    My maintenance schedule with an AR would vary depending on its use.

    A plinker would get the least maintenance.
    A competitive gun would get more.
    A gun I will bet my life on will get the most aggresive maintenance.

    One of the things that we seek to avoid is catastrophic failure of a part that renders the gun inoperable.

    It seems to me that a gas tube will not fail that way. If it gets clogged (and I've never heard of that) it would fail gradually. A failure to extract here. Then maybe failing to lock back on an empty mag.

    The bottom line here is that if a gas tube clogged, it would be gradual. It wouldn't just suddenly stop cycling the action. As such, I don't think there is any need to change it on time.

    Here is a question to some of the really experienced guys out there. have you ever seen a clogged gas tube? It would seem to me that the tube would build up some crap, but then reach an equilibrium at which point the 10,000 psi of combustion gas would remove anything as quickly as it accumulated.

    Don
    Last edited by dcmdon; 06-09-09 at 09:55.

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