My first suppressor used K baffles and it worked well but through trial and error I have found that the K baffles are heavy and not as effecient as cones for high power rifles , most of the suppressors you see with K's are pistol suppressors. Quick Silver Manufacturing uses a modified K in their all titanium suppressors and they do work but they also use a very tight bore which make the suppressor more effecient.
the K- baffles I made came out great but they are very labor intensive to make correctly compaired to a cone
I'll try and see wher in this waste land of a computer I have stored some pattents of several differant suppressors , to give you a better idea of who is using what.
What type of rifle are you wanting to suppress and what are the wants and needs for your suppressor , I meen are you trying to keep is as compact and light as possible or is it going on a weapon that would be hauled very far