glock 20 converted to .40 cal

Discussion in 'Glock Forum' started by randyh, Jan 17, 2010.

  1. randyh

    randyh New Member

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    Can you convert a glock 20 10mm to shoot .40 cal ammo? i have heard you put a .40 cal barrel in it (drop in) and shoot .40 cal ammo true or false is this safe will damage the pistol? any info helpful.
     
  2. Scott3670

    Scott3670 New Member

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    Dropping in a barrell might work but would 40 ammo cycle in a mag designed for 10mm? I am not a pro on Glock so I may be way off base here.
     

  3. MB44

    MB44 New Member

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    I guess you could make it work if you REALLY wanted it to make a point out of it,.... but I think there is a reason why GLOCK sells the model 20 (10mm) and the model 22(.40 S&W). Otherwise they would just sell the 20 and and conversion kit,.....
     
  4. Glock17TJ

    Glock17TJ New Member

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    I have a g23...you can shoot 40cal...or change the barrel to shoot .357sig and use the same mags or you can swap barrels and shoot 9mm ammo just change mags to 9mm mags..
     
  5. Snubshooter

    Snubshooter New Member

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    I have a g20 and I have a 40s+w barrel for it. It works fine. Remember most parts ,including slide springs, in Glocks are universally interchangable between calibers and frame sizes. Extractor placement in the frame is different for certain calibers. The 10mm and the 40 have the same head, the 40 is a 10 short for all practicle purposes.
     
  6. MB44

    MB44 New Member

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    Let me get this straight : All you did was to drop in a .40SW barrel in your GLOCK 20, and you could shoot .40S&W ?? :confused:

    What about Mags/Extractor/etc. ....???
     
  7. Snubshooter

    Snubshooter New Member

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    I use the 10mm mags. The extractor is the same, 10mm is just a long 40.
     
  8. group17

    group17 New Member

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    One of the reasons I picked up a G27 instead of a G26 was because with a barrel conversion and a 9mm mag you end up with two guns for the price of one. I can use my stock piled 9mm ammo if I run out of 40 in a pinch.