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AR15.COM
7/16/2003 1:34:05 AM EDT
Is there any way I can convert the caliber of my Glock 34 to .40S&W?

What will I need and where can I find what I need?
7/16/2003 5:15:23 AM EDT
[#1]
the only way to get to a .40 is to get a new upper.  if you had a G35, you could go from a .40 to .357 to a 9mm.

http://glockfaq.com/gunsmithing.htm#conversions
7/20/2003 9:36:17 AM EDT
[#2]
The narrower 9mm breachface is the crux.
you'd need both a .40 slide & barrel then the 2-Pin frame of the 34 may or may not be a good idea to fire a lot of .40 with.