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Thread: Intermediate Gas System Specs

  1. #11
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    The best way is to use a gauge pin or if you can find a bore mic that is small enough. But the drill method will narrow it down to a range.
    Last edited by Kevin_J; 03-10-09 at 08:04. Reason: Added comment about using drill bits.

  2. #12
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    Quote Originally Posted by bkb0000 View Post
    call noveske and ask what theirs is? i have one, but i don't rightly know how to measure a gas port. all i have is simple digital calipers.
    been waiting on a larue 11" to assemble this weapon, UPS dropped it off today.

    noveske 18" intermediate SPR barrel gas port measured .0840", FYI

  3. #13
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    Thank you sir!

  4. #14
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    Quote Originally Posted by bkb0000 View Post
    been waiting on a larue 11" to assemble this weapon, UPS dropped it off today.

    noveske 18" intermediate SPR barrel gas port measured .0840", FYI
    sounds like a nice build, will you be sharing pics?

  5. #15
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    Depends on the caliber, powder and bullet weights you are using. An intermediate length would work great on a 20" 6.8 because the pressure curve drops off quick due to the faster powders and larger bore space used in 6.8s.
    On the 5.56 I have seen 3 gunners use rifle length on 18" barrels to soften the recoil but I am sure the intermediate length would work well also even with lower charges.
    When building a rifle for myself I already have a good idea of the handload I want to use, one that has been accurate in many rifles so I start with a small port
    1/16" and work up till I get reliable cycling, I never go over .938-3/32" on a mid or rifle length as accuracy goes out the window pretty quick.
    AR15performance
    TRUMP 2020
    The 6.8 is the best choice for hunting deer and hogs with an AR15.

  6. #16
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    Quote Originally Posted by trinydex View Post
    sounds like a nice build, will you be sharing pics?
    i'm all about pics, though generally not just to show off. but since you twisted my arm, and all..

    thus far:


    the LMT's coming off to make room for an Aeroprecision/UBR/Geissele DMR

    that is, by the way, a one-of-a-kind barrel... noveske has never made an SPR with a FSB before. i wanted an SPR, but i don't do flipup FSBs- so i had 'em turn and tap the barrel for a fixed.

    havent decided on glass- most likely a leupy mark 4, like everyone else with an SPR.

  7. #17
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    looks nice. does standard height mount for glass peep over the fsb enough?

  8. #18
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    Quote Originally Posted by trinydex View Post
    looks nice. does standard height mount for glass peep over the fsb enough?
    not likely, low X settings will probably be hazy and retarded. i sort of repent my choice, but it's hard to let go of old habits. i've never even owned a flipup FSB, and dont trust them.

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