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Thread: .40 upper?

  1. #11
    Join Date
    Mar 2018
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    Quote Originally Posted by UTShooter71 View Post
    Hola,
    I have a PSA PX-9, AR9 9mm pistol that is set for Glock mags. PSA does not make a .40 upper and that is what I am looking for. Does anyone know of an upper that will work with the PSA lower?
    I have a PSA lower (Glock Magazines) that works fine with a lower I built using KVP 40 S&W barrel. These barrels are on sale at Job Bob Outfitters for $80 right now. I mounted it in a $40 slick side Anderson upper and used a $45 Double Star Carbine length float tube.
    Utterly reliable using the KVP 40 BCG from Joe Bob's though I always polish the feed cone on Blow Back barrels prior to installation.

    If you don't want to build an upper then Stern Defense would be my choice. There BCG should work even better because it is an ounce heavier than the KVP BCG. I added the KAK tungsten weight to my KVP BCG which brings the weight up to 16.5oz and helps mitigate recoil.

  2. #12
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    Aug 2018
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    Quote Originally Posted by NQNPIII View Post
    I took it on my own to notch the upper. Left and right is some U notches to go to the M4 feed ramps. Glock mags feed from the center I cut a notch in the center to the same depth. I'm not sure it helps. Don't think it hurt.
    Ive shot three different barrels using a QC10 lower, new frontier, gorilla machining and Faxon....I did have the feed cone worked on by Macon Armory, but have not shot any hollow points in it......the new frontier barrel works fine with hollow points and the gorilla machining barrel has only seen ball....

  3. #13
    Join Date
    Mar 2018
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    2 Hollers over from TNOutdoors9 Hickman County, TN
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    Very nice!

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