I've tried both, and my medium-large mitts prefer the 17.
If you want to read a very good article, this is one of the best I've found:
http://wilsondefense.########.ca/2011/07/glock-17best-of-breed.html
If you want to read a very good article, this is one of the best I've found:
http://wilsondefense.########.ca/2011/07/glock-17best-of-breed.html
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