AR10, AR308 6-position Mil-spec Extension Tube: $23 delivered

Discussion in 'HOT Deals - Links to what we can't live without' started by YeeHaa, Nov 27, 2019.

  1. YeeHaa

    YeeHaa Member Charter Life Member

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  2. bigfutz

    bigfutz Member

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    The longer tubes use standard AR-15 buffers. The shorter tubes (which I think are standard AR-15 tubes) require a short buffer, due to the longer stroke of the BCG. If you go with the longer tube, you have a larger selection of buffers to choose from. This info is from my personal observation only.
     
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  3. YeeHaa

    YeeHaa Member Charter Life Member

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    not for "bigfutz", but for the inquiring;

    First, I am NOT a Gun Smith and am expanding on sharing the following to HELP others that primarily have or are experiencing cycling ~ extraction / ejection issues with their AR10 rig.

    The standard AR15 buffer tube measures 7" on the inside.
    The AR10 buffer tube measures 7 3/4" on the inside.

    In my experience ( others as well ) there are 3 areas that effect what I mentioned above.

    1) The buffer tube, buffer & spring ( bigfutz mentioned ).
    There are several combinations one can come up with in a buffer system and whatever combination is decided on you Must make sure the BCG does not KISS or contact / slam into the lower.
    Some fellow shooters already know about the short & long buffer tubes and have chosen to use the 7" tube as a personal preference, which is fine and I have ( or did have ) rigs setup with a 7" tube.
    This situation could come into play if you bought an AR10 rig, it was setup with a 7" tube, started developing issues and are not aware of the differences.

    2) BCG issues.
    Some of the early PSA rigs had an extractor issue. To learn more on this , google it.

    3) Gas System
    PSA Rigs are ( or were ) Over Gassed and while so, that usually lends itself to an operating rifle but it Beats The Hell of other components.
    One issue with PSA Rigs being ( or were ) over gassed is that some or many PA10s used an AR15 Gas Tube which is TOO Short with many or all Rifle length gas systems and some or many Mid-Length systems as well.

    So, one situation is, or could be to, when your rig is over gassed and having a Shorter than normal gas tube installed ( not seating fully into the "gas key " ) it may , will or did function fine ,, until something gets ,,, Lazy(?) and a proper length may have prevented your current challenges or headaches.

    Also, to my Surprise, it seems that AR10 gas tube~s ( or not ) are and can be "Hotly Contested" issue, etc, etc. Going to Fun Shows looking for 10 tubes has led to several ,, "Spirited" conversations ~ exchanges.
    Several dealers have been very passionate that the AR10 platform uses ONLY the tubes common with the AR15 platform. Well this is not true and if it were there are a few manufactures that offer the proper tube~s and below is one of ( to my knowledge ) less than a Hand Full.


    https://andersonmanufacturing.com/am-10-gas-tube-rifle-length.html

    Others, as well as myself, have shared their AR10 findings in this forum ( search for the info ) and there is limited info at other sites that support the AR10 platform.

    In the end, the issues listed above can be very frustrating and my purpose here ( as well as bigfutz ) is to help.

    Bottom line, if you use your rifle, you want to have confidence in it, period.


    Safe Shooting
     
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  4. bigfutz

    bigfutz Member

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    Great info @YeeHaa. FWIW, my experience/observation: the shorter tube + mini buffer = DPMS, the longer tube + standard AR-15 buffer = PSA.