I recently looked at a used G30 at a shop. The s/n began with "C", I believe. The gun was clearly worn in several areas. This gun felt quite heavy to me, more so than the 23 ounces it's supposed to weigh. I haven't seen one of the newer G30's yet. My question is, are there frame differences in the older versus the newer G30 models? This older one felt heavier than all of my other handguns which I know to be lighter. Thanks for the help.