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Notice:

LWD 9mm conversion barrels will allow you to shoot 9mm ammunition from your Glock 40 S&W or 357 Sig handgun. These conversion barrels are easy to use and install the same as any other barrel, simply drop it in, no gunsmithing or other modifications are required. We do recommend you use the correct 9mm magazine with these conversion barrels to guarantee reliable feeding.

When dealing with 9mm conversion barrels, some shooters may be affected by the poor performance of low powered 115 grain ammunition causing a Failure To Eject (FTE). A good example of ammunition that is “most likely to fail” is Winchester White Box (WWB). This rare failure is too low of a percentage to make it an issue, however it is one we are well aware of. The fix to resolve this issue is quite simple:

  1. Clean and lube your slide and barrel.

  2. Shoot 1 mag to 1 box of good quality +P or +P+ ammunition through the barrel.

  3. Try the FTF ammunition again. If it runs, great!  If you experience more failures, you will have a couple choices to make:

    1. Reduce the recoil spring weight to 15 lbs. Cost is about $25 for stainless steel guide rod and a reduced power spring. See guide rods here. See springs here.

    2. Exclusively shoot 124 gr or a better quality 115 gr ammunition. The FTF 115 gr ammunition you are currently using is no longer a valid option. 

 
What causes this problem? Several issues come into play:

  1. The 40 slide and (40 conversion) barrel are thicker than standard 9mm slides and barrels. This extra thickness equates to more weight. The combined extra weight taps the energy of the "weak 115 gr ammunition” to its complete demise. It simply lacks in power and fails to reliably eject the spent round.

  2. Every once in awhile a Failure To Feed/Failure To Eject (FTF/FTE) is caused by a fit issue. We resolve fit issues by pumping +P or +P+ ammunition through the gun. This hot ammunition provides extra pressure and the pressure will positively align any and all components. Once they are all aligned, there is no longer a fit issue. The FTF/FTE is usually resolved.

 
*FYI - Several manufactures are currently producing low powered 115 gr 9mm loads. This ammunition is also known to produce failures in all standard model Glock 9mm pistols.
 

*Please note: To convert any .40 caliber gun to .357 or vise versa, you don't need a "conversion", simply purchase the barrel to the corresponding Glock model. 

*Don't forget to buy the proper magazines for your conversions.


 
For converting your Model 27, 33, 23, 32, 22, and 31 to 9mm :

9mm Model 27,33         9mm Model 23,32         9mm Model 22,31
  Glock OEM                    Glock OEM                    Glock OEM
                                                        


For converting your Model 33, 32, and 31 to .40S&W:

.40S&W Model 33          .40S&W Model 32          .40S&W Model 31
    Glock OEM                   Glock OEM                    Glock OEM
                                                            


For converting your Model 27, 23, and 22  to .357SIG:

.357SIG Model 27         .357SIG Model 23         .357SIG Model 22
     Glock OEM                   Glock OEM                    Glock OEM
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Length 5.47 inches, 139 mm
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Length 6.02 inch, 153 mm
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Length 4.6 inch, 117 mm
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Length 6.02 inch, 153 mm
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$149.95
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Length 4.6 inch, 118 mm
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Length 3.78 inch, 96 mm
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Black Oxide finish. Length 3.78 inch, 96 mm
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Length 4.60 inch, 117 mm
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Extended length: 6.02 inch, 153 mm
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PVD (AlTiN) Length 4.6 inch, 118 mm
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PVD (DLC) Length 4.6 inch, 118 mm
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