Zytel handle C/K Folder was one of the heaviest folders on market - over 210g(7 oz.)
But because of size and grip it was great Pdf(primary defence folder), but it never made a good utility knife - thick blade, low primary grind. thin false edge, needle point tip. But after all utility wasn't purpose of Kasper when designing this knife.
There is another knife somewhat similar to C/K F - it's Timberline Worden tactical - although it's handle and blade has more "east taste" than "western modern" shape of CRKT, but it's also over 7 oz. heavy, almost 10inches long, and offer incredible grip(and aus8 blade). And like in crkt, you can use hefty backspacer to drive nails (or bash skulls)