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Thread: Flatline and FN303 reg piston

  1. #1

    Flatline and FN303 reg piston

    I have heard that the FN303 reg is based off the 3k Flatline.
    My FN now somehow has a bent pin on the reg piston and the only similar things AGD and Tuna have in their stores is the 4.5k Flatline reg piston.

    So this is sort of 2 questions:
    Does anyone know if the FN303 and 3k Flatline reg pistons are the same?
    and
    Does anyone know if the 3k Flatline and 4.5k Flatline reg pistons are the same dimensions (with the relief pressure obviously being different)?

    Thanks.

  2. #2
    Join Date
    Oct 2004
    Location
    Mt. Pleasant, SC
    Posts
    2,126
    The shape of the tip is different. One is designed to seal on an oring. The other designed for the 4.5k reg sear which isnít made any more.

    Get the 3k. Contact sandman he should be able to help.


    Sent from my iPhone using Tapatalk

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