from what little info I could find there was only 1k of three diff calibers made. are they worth anymore than a standard model? and is there anymore info behind these guns? my 2nd mom just a very close friend who's now a widow has her late husbands 9-11 G21 so im tryn to find out everything i can for her.. they had no children so they took me on years ago. thanks for any info and input.