Triple Aught Designs Strider Tactical AR. Custom work done by an EXTREMELY FAMOUS snd talented knife maker who's name I have completely forgotten. What he did was smooth up the action, and anodize the titanium liners "toxic" green. Four extremely aggressive teeth cut into back half of blade. This knife is LARGE and extremely sharp. I have used this knife and carried it but it is still in excellent condition. Pics available via email. 72 hour inspection - satisfaction guaranteed. I paid $500 for this and will offer it for $350 shipped - Paypal only.