Mike, it's my understanding that most of the mods that you would want to do to the 17 can be done on the 34. Yes, 17 mags will work in the 34. If you want a good comparison of the differences you could always go to the Glock website. They have a lot of info and a comparison chart that will help. You also might check out the website: Glocktalk.com, they have very knowledgeable people on it.

Dan Snyder
RKS #5537
SHAG #010
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