25th Anniversary K9
25th Anniversary K9

Announcement

Collapse
No announcement yet.

HELP! CM9 2 cut grooves in slide pic Normal?

Collapse
X
  • Filter
  • Time
  • Show
Clear All
new posts

  • HELP! CM9 2 cut grooves in slide pic Normal?

    Hi guys,

    Hoping you pros could help me out...

    Please check your CM9 or PM9 and see if you have the same2 rough cut grooves like the pic shows. I have NEVER fired this CM9 it's brand spankin new.

    Normal?


  • #2
    I'm not sure what it is but mine has it also. It is also 1 1/2 years old and has never failed to fire in 800 rounds.

    I wouldn't worry, go shoot it and enjoy yourself.

    Welcome to the forum by the way.
    The only thing better than having all the guns and ammo you'd ever need would be being able to shoot it all off the back porch.

    Want to see what will be the end of our country as we know it???
    Visit here:
    http://www.usdebtclock.org/

    Comment


    • #3
      agree, quit nickpinkin and just shoot it like u stole it. do thekahr prep and the kahr lube chart andu willbegood to go. Nice gun..
      . 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

      Comment


      • #4
        Probably just a little fine tuning to the machine work.

        That's an awesome picture, and except for those two little spots looks like a machinist thing of beauty.

        The extractor looks really skookum. I don't think either of mine look that good.

        I certainly don't see any reason for concern.
        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

        Comment


        • #5
          Originally posted by jocko View Post
          agree, quit nickpinkin and just shoot it like u stole it. do thekahr prep and the kahr lube chart andu willbegood to go. Nice gun..

          Do you really have 32k thru your gun? What have you had to replace on it? How many mags??

          Comment


          • #6
            I have a new CM9 I haven't yet had a chance to fire as well. Same machining marks as shown; if not for this thread I probably wouldn't have given it a second thought.

            Comment


            • #7
              My new (October 2012) CM9 has those exact grooves. Over 700 flawless rounds so far.

              Comment


              • #8
                u know what

                Originally posted by ah.74 View Post
                i have a new cm9 i haven't yet had a chance to fire as well. Same machining marks as shown; if not for this thread i probably wouldn't have given it a second thought.
                then don't.
                . 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

                Comment


                • #9
                  Originally posted by Sirvive View Post
                  Hi guys,

                  Hoping you pros could help me out...

                  Please check your CM9 or PM9 and see if you have the same2 rough cut grooves like the pic shows. I have NEVER fired this CM9 it's brand spankin new.

                  Normal?


                  S:

                  I believe that those two rounded machinings in the corners are there to prevent cracks from developing from stress in the sharp 90deg corners.

                  HTH
                  -steve
                  -NRA Life Member

                  -Pants up! Don't Loot!

                  -It isn’t Islamophobia when they really ARE trying to kill you!

                  -Arms discourage and keep the invader and plunderer in awe, and preserve order in the world as well as property.
                  Horrid mischief would ensue were the law-abiding deprived of the use of them.
                  -Thomas Paine

                  Comment


                  • #10
                    Just another confirmation:Those lines or whatever they are are on my mk9 & mk40.

                    Comment


                    • #11
                      Originally posted by sas PM9 View Post
                      S:

                      I believe that those two rounded machinings in the corners are there to prevent cracks from developing from stress in the sharp 90deg corners.

                      HTH
                      -steve
                      I'll buy that statement.
                      The only thing better than having all the guns and ammo you'd ever need would be being able to shoot it all off the back porch.

                      Want to see what will be the end of our country as we know it???
                      Visit here:
                      http://www.usdebtclock.org/

                      Comment


                      • #12
                        someone her with an enfgineering mind might just have hit on the reason. One of my kahrs does not have it, I think it is defective?????? Just sayin

                        I think it is my trusty PMJ9 with 32K rounds through it..
                        . 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

                        Comment


                        • #13
                          My P9 has the marks also.
                          "To argue with a person who has renounced the use of reason is like administering medication to the dead." Thomas Paine

                          Comment


                          • #14
                            Originally posted by sas PM9 View Post
                            S:

                            I believe that those two rounded machinings in the corners are there to prevent cracks from developing from stress in the sharp 90deg corners.

                            HTH
                            -steve
                            Nada. Two grooves makes it a Kahr ASHTRAY (see way below).

                            ~~

                            I'm tending to disagree for a couple of reasons.

                            First off, you'd stress relieve the entire transition, not just part of it. I've never seen a partial stress relief cut - ever.
                            Second, stress relief is almost always the inclusion of a radius at the bend, not a cut at the bend. It "can" be a cut... just not normal practice.

                            And third - My own PM9 and both of the PM45's dont have any sort of cut like that.

                            My take: The cuts are made by a broaching process. Depending on what they're using for a broaching machine, it "appears" that the tooling was not quite as it should be. This all gets in to how the machine works, and how the cutter was made - with chip breakers, chip relief... how the passes are made. Just sayin'... I think its a minor error in machining.

                            On the other hand - absolutely nothing to be worried about - in my estimation. Its not a locking area, nor is it a wear area. You're not likely to see cracking occur there, and its a very rare thing for a kahr slide to crack anyway. All the real stress is at the front end where the spring hood smacks the recoil spring guide at high speed, and/or, where the barrel locks at the top. I'd expect to see rail cracking first, before that area. Just edumacated guessimications,

                            ~~

                            As Bill Cosby once noted, anything made in shop class that didn't quite turn out as expected, you just cut two grooves in it, and call it an ASHTRAY!

                            Comment


                            • #15
                              The Big Grin Club!

                              Welcome to the forum, Survive! There is a wealth of valuable information in the New Member Area and the Kahr-Tech sections of the forum.

                              And welcome to the CM9 Owners Club! Our official symbol is the wide grin smily because we are so happy with our purchase that we can't wipe the smiles off our faces!

                              Here is your club badge.
                              Very interesting...

                              Comment

                              Working...
                              X