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How to get a clean mag drop on CM9/PM9

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  • #1

    How to get a clean mag drop on CM9/PM9

    I've done a little experimenting with my CM9 and its 6 round magazines. When I got the pistol, the magazines were tight in the frame and would not drop. I checked and smoothed the inside of the magwell and polished the mag release face, nothing really helped. Then I measured the width of the magazine at the top. They were all 0.492-0.495 inches near the lips. Down lower on the magazine the width was less. I squeezed the mags in a vise very carefully at the lips to get the width down under 0.490. Problem solved. Follower still free, rounds still free, no problems at all. Then I polished the mags with 600 grit and some Flitz, especially above the mag catch slot, to smooth the insertion. Now I have 3 perfect mags and a perfect CM9 and am comfortable trying it in an IDPA club match next month. If I practice some more!

    I also added the CW40 base plates and base plate retainers to these magazines for a little more pinky grip and to take the ground hits on drops.







    Kahr CM9 9mm, Kahr PM40 40cal, SIG x-Five All Round 9, SIG P226 9, 40, and 357Sig barrels/slides, SIG P239-9mm, Desert Eagle 1911G, CZ75B Da/SA converted to SAO and Kadet 22 slide
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  • #2
    Where did you get your base, etc., your mags looks great. just recently got a CM9, and like that with the mags, and also got to see if front sights can be changed and all. Have only run 100 rounds so far but have had no problems at all. First Kahr, and really like it so far.

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    • #3
      Originally posted by Papa13 View Post
      Where did you get your base, etc., your mags looks great.
      Got the retainers and the mag base plates from Kahr direct. Not cheap, for plastic. I removed the lip at the front of the base plate with a Dremel and some 600 grit. Go look at the CW40 parts list for magazines and you will see what I bought.

      I did the same thing on my PM40 mags and base plates. It works great also.

      Joe
      Kahr CM9 9mm, Kahr PM40 40cal, SIG x-Five All Round 9, SIG P226 9, 40, and 357Sig barrels/slides, SIG P239-9mm, Desert Eagle 1911G, CZ75B Da/SA converted to SAO and Kadet 22 slide

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      • #4
        Great tip, but another DIY required being a Kahr owner. On my Kahr 6 rnd mags, one drops, the other tight. I'll have to measure.
        I don't really mind fiddling around with the CM9, but really wish Meccanica Del Sarca (Beretta) would take over their magazine production. Seems the Italians have the corner on high quality mag production.

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        • #5
          I kinda like making these very small adjustments to get the gun exactly the way I want. I have a three dot rear sight coming to. And I've adjusted the sights already. My 1 month old gun looks old! It is definitely mine, all mine.

          Joe
          Kahr CM9 9mm, Kahr PM40 40cal, SIG x-Five All Round 9, SIG P226 9, 40, and 357Sig barrels/slides, SIG P239-9mm, Desert Eagle 1911G, CZ75B Da/SA converted to SAO and Kadet 22 slide

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          • #6
            Good input for those who are having a mag drop problem and want it corrected. I've been lucky with all my PM40 mags...no problems. But if I do develop a problem, now I know where to start looking. A final buffing with Johnsons Floor Paste Wax helps too. An old wood worker's trick to get the surface of metal parts to be slick and protected without sticky residue. TX.
            My Sword - PM4044N/CTL/Talons
            - "One should diligently train at all times." Miyamoto Musashi
            - "Train in technique until it requires no thought - no mind and just happens." Takan Soho
            - "The truth beyond the technique....Here's where we stop thinking and start shooting." Brian Enos
            - "A single sword against the cold sky." Yamaoka Tesshu
            - "You must concentrate upon and consecrate yourself wholly to each day, as though a fire were raging in your hair."
            Taisen Deshimaru
            - "Know your sword!"

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            • #7
              nice job and good photos to back it up. That is what helps alot---PHOTOS AI am sure most all issues are mag related andnot magwell related and ur fix kinda proves that point to.

              again nice work and as long as thefollower moves upward freely --SQUEEZE AWAY
              . My PM9 has over 34,000+ rounds through it, and runs much better than an illegal trying to get across our border


              NRA BENEFACTOR MEMBER


              MAY GOD BLESS MUGGSY

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              • #8
                I have two 6 round mags that don't drop free and one 6 round mag that does drop free.

                Thanks for the tip, I will have to measure them and see what I have.

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                • #9
                  Originally posted by Joe L View Post
                  Got the retainers and the mag base plates from Kahr direct. Not cheap, for plastic. I removed the lip at the front of the base plate with a Dremel and some 600 grit. Go look at the CW40 parts list for magazines and you will see what I bought.

                  I did the same thing on my PM40 mags and base plates. It works great also.

                  Joe
                  Note that I also had to take 0.030 or so off the top of the CW9 baseplate to allow full insertion of the magazine. If you just put the baseplates on the magazines and insert them in the pistol, the mag release won't catch.

                  Also, if you try using the metal base plate retainer with the plastic baseplate, the baseplate will fly off the first time it hits the ground. You can push the plastic baseplate off the magazine without depressing the metal retainer plate. You MUST use the plastic retainer plate with the plastic baseplate.
                  Kahr CM9 9mm, Kahr PM40 40cal, SIG x-Five All Round 9, SIG P226 9, 40, and 357Sig barrels/slides, SIG P239-9mm, Desert Eagle 1911G, CZ75B Da/SA converted to SAO and Kadet 22 slide

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                  • #10
                    Good way to remove the unsightly gap between mag base and frame. Do you still end up with a little gap to be able to make the catch work or is it closer to flush?
                    http://bawanna45.wix.com/bawannas-grip-emporium#!
                    In Memory of Paul "Dietrich" Stines.
                    Dad: Say something nice to your cousin Shirley
                    Dietrich: For a fat girl you sure don't sweat much.
                    Cue sound of Head slap.

                    RIP Muggsy & TMan

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                    • #11
                      Originally posted by Bawanna View Post
                      Good way to remove the unsightly gap between mag base and frame. Do you still end up with a little gap to be able to make the catch work or is it closer to flush?
                      Just enough to that you can see the metal magazine with a light, probaby 0.020 gap all the way around with the magazine latched in place. All the way around is the important part.
                      Kahr CM9 9mm, Kahr PM40 40cal, SIG x-Five All Round 9, SIG P226 9, 40, and 357Sig barrels/slides, SIG P239-9mm, Desert Eagle 1911G, CZ75B Da/SA converted to SAO and Kadet 22 slide

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                      • #12
                        I didn't have to squeeze the new 8 round mag I received from Kahr today, haven't measured it either. It was fine, dropped without modifications or even polishing, but I polished it up some anyway.
                        Kahr CM9 9mm, Kahr PM40 40cal, SIG x-Five All Round 9, SIG P226 9, 40, and 357Sig barrels/slides, SIG P239-9mm, Desert Eagle 1911G, CZ75B Da/SA converted to SAO and Kadet 22 slide

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                        • #13
                          Nice DIY and great photos. I am a new CM9 owner and still soaking up all the info on here. How about a picture of an inserted mag so we can see the gap (or lack of)?

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                          • #14
                            Here are photos, as requested...






                            These also show the pinky wrap provided by the small extension of the plastic base plate.

                            Joe
                            Kahr CM9 9mm, Kahr PM40 40cal, SIG x-Five All Round 9, SIG P226 9, 40, and 357Sig barrels/slides, SIG P239-9mm, Desert Eagle 1911G, CZ75B Da/SA converted to SAO and Kadet 22 slide

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                            • #15
                              Good post! Someday I will pick up a CM9, but for now the info you provided will help with the same issue i have with my CW9. Failure to have the mags drop freely is very frustrating. Thanks again!

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