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Converting Shield from .40 to 9mm

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  • Kestryll
    Head Janitor
    • Oct 2005
    • 21580

    Converting Shield from .40 to 9mm

    In the past few years the S&W Shield has become one of the more popular pistols for concealed carry or just general defense, it’s small, light, slender and in 9mm controllable. But what if you find yourself in the situation I found myself in, with a Shield in 40 S&W. The 40 S&W Shield is still light, small and slender but as for controllable well that’s where the larger caliber loses points against the 9mm.

    Conversion barrels abound for many handguns, the 40 S&W Glocks and standard M&Ps can be converted to 9mm and .357 Sig with a simple barrel swap and my XD 40 currently has a 9mm barrel in it. But the Shield has suffered a surprising lack of conversion barrels. This is somewhat surprising given that the factory 40 and 9mm barrels have nearly identical external dimensions. I say ‘nearly identical’ because there is a negligible difference in the rear of the barrel between the two.

    Well I have good news, unless you’re in California like I am then I have somewhat good news. This month, June 2017, Lone Wolf released a couple of lines of 9mm S&W Shield barrels. These come in standard and threaded. The threaded cannot be used in California, apparently or Legislature believes that having a threaded barrel in a pistol will make you involuntarily kill a bus load of nuns on their way to feed the homeless. But we can still use the standard barrel right? Well… not exactly.

    One of the other ‘gifts’ we Californians have been given by our all-knowing Legislature is a list of ‘safety features’ required on all handguns. None of these features make a handgun any safer but they sure do provide a nifty way to limit the models of handguns California citizens can buy. Then again when has ‘gun control’ ever been about safety? One of the requirements is a Loaded Chamber Indicator (LCI) meant to give a visual and tactile indication of a loaded chamber. In the case of the S&W Shield this is a slot cut in to the top of the slide with a spring loaded lever that pops up when there is a round in the chamber.

    A side by side comparison of a standard Shield barrel and a CA Shield barrel shows a difference in construction between the two. The standard barrel has a dished half circle cut in to the hood and the CA Shield barrel has a slot cut in to the rear of the barrel hood for the indicator lever. The new Lone Wolf barrels have a standard barrel hood with the dished half circle meaning they will not work in a stock CA Shield slide. The LCI lever would not allow the slide to properly go in to battery. California’s asinine requirements have stifled my ability to convert my 40 S&W Shield in to a 9mm S&W Shield. Or have they…


    As onerous as California laws are they have had an interesting side effect of inspiring some rather ingenious methods of complying with the laws while still being able to own and use our firearms. In this spirit I started looking at ‘How can I make this work without having to do any modifications to the new barrel?” The problem was that the LCI Lever would impede the barrel hood preventing the gun from going in to battery. But what if the lever was not there? I could remove the LCI but that would leave a large slot in the top of my slide and a hole where the LCI spring sits.

    APEX Tactical provides the answer, the make two replacement parts for the S&W Shield LCI. One is a low profile LCI which retains the LCI but reduces its height the other is a ‘no profile’ LCI filler. The ‘no profile’ LCI not only fills the slot in the slide it removes to portion of the LCI lever that protrudes in to the barrel hood making the slide flush where it mates with the barrel hood. Replacing the LCI is simple, a small hammer, a roll pin punch and about four minutes is all you need.


    Replacing the LCI did the job, the APEX Tactical ‘no profile’ LCI allowed the Lone Wolf AlphaWolf Shield barrel to drop right in to my 40 S&W Shield. Lock up is tight and so far running rounds through it by hand has been flawless. Next is a range trip for a trial by firing where I suspect it will perform without a problem. For just a hair over $150 my S&W Shield has become a dual caliber handgun. One interesting side effect has been that it feels lighter in the hand and pocket loaded with 9mm rounds then it did loaded with 40 S&W rounds.
    Attached Files
    Last edited by Kestryll; 06-16-2017, 2:56 PM.
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  • #2
    Lonestargrizzly not a Cabinetguy
    Calguns Addict
    • Dec 2015
    • 6502

    Nice.
    Would be interesting if they made the Shield in 357 sig.

    Also, it's surprising that after selling 1 million units within the first 3 years there isn't more aftermarket support.
    Things are looking up for Smith & Wesson this month, as the company has just passed their millionth mark in Shield production.Hard to believe, the pistol has been in production for five years already, and I think it is safe to say that it is still just as popular as ever.Despite one recall in 2013, but I think that is a good run for a platform that was semi new to the market (from its big brother, the M&P).

    Now I'm curious as to how many have been sold overall, it being 5 years since the Shield was introduced.

    Comment

    • #3
      Libertyvirgins
      Junior Member
      • Sep 2015
      • 76

      True Precision also makes a nice 9mm conversion barrel for the shield. Hoping for .357sig

      Comment

      • #4
        dscoduc
        Senior Member
        • Jan 2012
        • 845

        Looking at the barrel options on the Lone Wolf site I don't see the non-threaded 40-9 Shield Barrel... Could you share the part number of the barrel you purchased?

        Much appreciated!

        Comment

        • #5
          meno377
          ?????
          CGN Contributor - Lifetime
          • Jul 2013
          • 4911

          Originally posted by dscoduc
          Looking at the barrel options on the Lone Wolf site I don't see the non-threaded 40-9 Shield Barrel... Could you share the part number of the barrel you purchased?

          Much appreciated!
          Lone Wolf Arms is the largest manufacturer of aftermarket parts for Glocks. We also have M&P Shield, Beretta/Taurus, and Browning Hi-Power parts.



          Last edited by meno377; 06-16-2017, 4:17 PM.
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          • #6
            Kestryll
            Head Janitor
            • Oct 2005
            • 21580

            That is the part, thanks meno!

            A couple of comments on the video, when it was made S&W was selling barrels now they do not sell the 9mm barrel as an individual part. Sadly the stock barrels are not as readily available as they were back then.

            Also the 9mm barrel does have a miniscule gaps shown however when the recoil assembly is in place and the slide mounted on the frame I have zero side to side movement. The lock up is tight on mine.
            sigpic NRA Benefactor Life Member / CRPA Life Member / SAF Life Member
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            The California Rifle & Pistol Assoc. - Director.
            DONATE TO NRA-ILA, CGSSA, AND CRPAF NOW!
            Opinions posted in this account are my own and unless specifically stated as such are not the approved position of Calguns.net, CGSSA or CRPA.

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            • #7
              nickel plate
              Senior Member
              • Jul 2012
              • 2073

              Good research and nice to know for those who have a .40cal S&W Shield and want to drop it down to a 9mm.
              I bought a very early on SSE 9mm S&W Shield for CCW, have a couple of .45 1911s so a .40cal would only add more stress to my already overloaded mixed ammunition base.
              A few months after my Shield purchase I had an opportunity to range exchange with a friend, his .40cal and my 9mm. IMO I made the right choice.
              Off subject but how is the .45 Shield acting recoil-wise?
              I just have never been a fan of firearm convertibles.

              Comment

              • #8
                71MUSTY
                Calguns Addict
                • Mar 2014
                • 7029

                Nice, if you want to shoot .40 the M&P40c is a better tool. The dstack not only gives more capacity the wider grip makes shooting .40 much more enjoyable. Especially if you have bigger hands.
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                • #9
                  SkyHawk
                  I need a LIFE!!
                  • Sep 2012
                  • 23454

                  I remember when the Shield first came out and you could buy the other caliber barrel from the factory. I have no idea why S&W stopped selling barrels shortly after, but pistol sales may have had something to do with it. Good to know there is an alternative.
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                  • #10
                    Carcassonne
                    Veteran Member
                    • Jul 2012
                    • 4897

                    Originally posted by SkyHawk
                    I remember when the Shield first came out and you could buy the other caliber barrel from the factory. I have no idea why S&W stopped selling barrels shortly after, but pistol sales may have had something to do with it. Good to know there is an alternative.

                    S&W doesn't even sell spare parts for the Shield. Brownells doesn't have anything listed. Speed Shooters Specialties has some stuff, but my guess is those parts are compatible with another S&W gun.



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                    • #11
                      Gress
                      Member
                      • Jan 2010
                      • 250

                      For 40 to 9mm conversion I actually have a Remsport conversion barrel. Although the cut in the barrel hood is a half circle but down deeper into the cut it complies to CA loaded chamber indicator interface and therefore works properly.

                      Couple of pics


                      Here is OEM .40


                      And this is a 9mm conversion from Remsport






                      This 9mm conversion barrel shoots different brands and HP 9mm using original .40 mags with no hiccups.
                      Last edited by Gress; 08-09-2017, 1:04 PM.
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                      • #12
                        Webologist
                        Senior Member
                        • Jan 2010
                        • 650

                        Originally posted by nickel plate
                        Good research and nice to know for those who have a .40cal S&W Shield and want to drop it down to a 9mm.
                        I bought a very early on SSE 9mm S&W Shield for CCW, have a couple of .45 1911s so a .40cal would only add more stress to my already overloaded mixed ammunition base.
                        A few months after my Shield purchase I had an opportunity to range exchange with a friend, his .40cal and my 9mm. IMO I made the right choice.
                        Off subject but how is the .45 Shield acting recoil-wise?
                        I just have never been a fan of firearm convertibles.
                        .45 Shield has much less recoil than you would expect. It has a nice push, not at all snappy, and it returns right back. I like it a lot and use it for carry and BUG matches. I really like the aggressive grip texture. It has a set of TFO sights and an Apex Tactical trigger and Duty/Carry Action Enhancement Kit ready to install.
                        Last edited by Webologist; 08-08-2017, 8:32 PM.
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                        • #13
                          PoorRichRichard
                          Veteran Member
                          • Apr 2012
                          • 3081

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                          • #14
                            ojisan
                            Agent 86
                            CGN Contributor
                            • Apr 2008
                            • 11747

                            I love convertibles.
                            Good job and good thread!


                            Do give us a shooting / accuracy / reliability report, OK?

                            Originally posted by Citadelgrad87
                            I don't really care, I just like to argue.

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                            • #15
                              Darklyte27
                              Calguns Addict
                              • May 2008
                              • 9372

                              About time..
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