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Thread: AR15 Performance Super Bolt

  1. #31
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    Quote Originally Posted by rsilvers View Post
    MPI is not important at all and I am actually offended by the stupidity of it.
    I just about fell out of my chair as I read this...

    I thought MPI (along with HPT) was the holy grail for AR bolts.

  2. #32
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    MPI is not important at all and I am actually offended by the stupidity of it.
    Hope he explains.

  3. #33
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  4. #34
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    what are the list of companies that sell carpenter bolts?

    BCM and Colt for sure
    LMT and DD?
    Last edited by seabass03; 12-03-11 at 15:58.

  5. #35
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    Quote Originally Posted by rsilvers View Post
    I am not sure of the issues related to increasing the diameter around the cam pin hole, but I would be concerned that the Superbolt seems to mention the dry-film lube on the cam pin. Seems like he is saying the fit was made tighter than normal so it seems like it has a reduced ID also.
    Does anybody think its a benefit to have the cam pin fit loosely into the bolt?

    Seems like the cam pin rocking around can be a contributor to extra stress on the already thin area of the bolt.
    Black River Tactical
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  6. #36
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    Quote Originally Posted by Bimmer View Post
    I just about fell out of my chair as I read this...

    I thought MPI (along with HPT) was the holy grail for AR bolts.
    Quote Originally Posted by Shiz View Post
    Hope he explains.
    Quote Originally Posted by hiro View Post

    Very good discussion with a few details left out to make a decent decision though, mostly due to company secrets (no negative connotation implied). Failure rate during HPT/MPI of current bolts would be nice to know before moving beyond that.

  7. #37
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    Quote Originally Posted by orionz06 View Post
    Very good discussion with a few details left out to make a decent decision though, mostly due to company secrets (no negative connotation implied). Failure rate during HPT/MPI of current bolts would be nice to know before moving beyond that.
    As would the failure rate of bolts in the field that are batch tested.

  8. #38
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    Quote Originally Posted by Bimmer View Post
    I just about fell out of my chair as I read this...

    I thought MPI (along with HPT) was the holy grail for AR bolts.
    There are better ways to do test a bolt. One way would be to X-ray the steel PRIOR to it being manufacturered.

    Since no one is doing that, MPI is what we have and what the Govt calls for.



    C4

  9. #39
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    Quote Originally Posted by jmart View Post
    As would the failure rate of bolts in the field that are batch tested.

    Yup.
    Quote Originally Posted by C4IGrant View Post
    There are better ways to do test a bolt. One way would be to X-ray the steel PRIOR to it being manufacturered.

    Since no one is doing that, MPI is what we have and what the Govt calls for.


    C4
    Not sure why someone hasn't stepped up and started this or something similar. Lot's of room for good/better consumable items, including bolts.

  10. #40
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    Quote Originally Posted by rsilvers View Post
    I am open to nickel-boron, but only if it is does a certain way, and as far as I can tell *NO ONE* does it the way I think is correct.
    What, don't like the heat treat?
    Black River Tactical
    BRT OPTIMUM HFCL Barrels - Hammer Forged Chrome Lined 11.5", 12.5", 14.5"
    BRT OPTIMUM Barrels - 16" MPR, 14.5" MPC, 12.5" MRC, 11.5" CQB, 9" PDW
    BRT EZTUNE Preset Gas Tubes - CAR and MID
    BRT Covert Comps 7.62, 5.56, 6X, 9mm
    BRT MarkBlue Gas Tubes - BRT EXT, EXC and PDW Lengths
    BRT MicroPin Gas Blocks - .750" & .625"
    BRT MicroTUNE Adjustable Gas Blocks
    BRT CustomTUNE Gas Ports

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