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Conversion barrels

Discussion in 'Handguns: Autoloaders' started by tdstout, Nov 18, 2012.

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  1. tdstout

    tdstout Member

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    I have seen that there are a few different companies that make conversion barrels that turn your 40 into a 9mm or 357.

    Why can't you go from 45 to 40 or smaller? Is it a pressure issue or what?
     
  2. hatchetbearer

    hatchetbearer Member

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    breech face size is the main thing, switching from a .40 case rim to a 9mm (.380) is a difference of .02" where it is a .05" difference stepping down from .45 acp. affects the impact zone of the primer, extractor engagement etc.

    also most.45 versions of guns are built on a different frame as their smaller counterparts.
     
  3. hentown

    hentown Member

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    Mags won't work. Several companies do make 45/10mm conversion barrels, though.
     
  4. Certaindeaf

    Certaindeaf member

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    A conversion kit is more common. It depends upon the parent case normally, unless the gun in question is like a TC or something.
     
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