DESIGN PHILOSOPHY AND THE FUNCTION OF THE TACTICAL KNIFE
My design philosophy for tactical knives is simple and in two parts- the first part is is that for the knife to do you any good you have to have the knife with you when you need it.  The second part is that function dictates form; Ideally all parts of the knife will work together to enhance function.

A tactical knife has to be light, easy to carry and deploy.  It also has to be useful and comfortable to use.  It's a big plus if it's attractive and not inconveniently large, thick etc.  A knife possessing these qualities is more likely to be in your pocket when you actually need it.  The question has often been asked, "What is the best knife?" and the answer is, "The one you have with you when you need it.  So I make my tactical knives light-weight.  I design and place the pocket-clips on folders not merely to hold the knife in place in your pocket but to assist in deploying the knife from the pocket and to provide a good grip when deploying the blade.  The shape of the handle is designed to be comfortable yet to provide good retention in extreme circumstances.  On folding knives the long plunge at the start of the cutting edge provides an unsharpened section at the base of the blade that makes it difficult to damage yourself closing the knife while distracted.

As for function, what is the function of a Tactical Knife?  A certain amount of utility naturally for day-to-day chores but it's primary function is as a defensive tool.  This is the thing that you are least likely to do with the knife but it is the most important part of the 'mission' of the knife.  The function of a defensive knife is not to kill an assailant- it is to stop your attacker from attacking you.  Someone who is attacking you in a way that requires a lethal-force response might be on drugs, 'pumped' on adrenalin or deranged; in these circumstances you cannot necessarily count on deterence or any level of pain to stop them.  You need to have the capacity to physically interrupt the mechanisms that allow the body to operate.  You need to inflict catastrophic structural damage to your attacker.  As I have often told my students, "If you cut the strings the puppet can't dance."

In practical terms this means that you want to sever muscles, tendons and connective tissue, destroy vital organs and sever arteries to cause immediate and massive blood loss.  This is going to depend a lot on training but the design of your knife can be optimized for this function as well.  With a small knife like a tactical folder this optimization is especially important.  If the blade curves forward it will tend to draw the edge deeper into the cut, increasing the likelihood of severing muscles, veins and connective tissue.  Good ergonomics so that the point is easier to 'aim;'  practical experiments stabbing targets has shown that people are dramatically more likely to hit the target with a thrust if the point is inline with the large bones of the arm in an over-hand grip or perpendicular to those bones in an ice-pick grip.  A broad, sharp point like the eccentric chisel point produces a broader would channel even with minimal penetration, making it more likely to interrupt vital structures.  All of these things need to work together to make the defensive knife as efficient as possible for it's most vital function.

My tactical knives are designed with all of these criteria in mind; to be there with you when you need it, useful in daily chores and in addition to be optimized to stop an attacker in a worst-case scenario.