Agree with Bill, definitely the mini, model 812SBT. The mini has a bit of a hump along the spine of the blade between the thumb hole and the jimping. The full-size version doesn't have that. The blade of the full-size AFCK is around 4" long (give or take a fraction) measured from the handle to the tip of the blade. The blade of the mini AFCK is around 3.25".
Unless my eyes are playing tricks on me, your knife also appears to be an older, original version of the mini as it appears to have hex drive handle screws (the smaller screws, not the pivot screw). They later switched to torx handle screws.
Yes you are correct they are hex screws thank you for your help and details much appreciated.
The opposite side of the blade should say what steel the blade is made of. My guess would be ATS-34.