A local shop is selling a G17 hicap mag that appears to be gen3 by the angled notch on the back. I'm not to familiar with the Glock mags. Is this a FML drop free? The count holes in the back appear to have metal around the holes itself. Also the notch on the back where the primer area sits has metal. Is $79.95 considered cheap for a G17 hicap? Thanks.