Buck 110 with Thumb Stud

Here is a Buck 110 with thumb stud for one handed opening. The blade is 5160 and it's carried in a horizontal sheath.
Years ago when I was a Park Ranger in New Jersey USA, my first good knife was a Buck 112 with an add on Kwik thumb stud. Now that I've been using this 110 for a while, I often find the need to open one handed. So I got this stud that fastens with a set screw like my original 112 from the 1990's.

Видео Buck 110 with Thumb Stud канала Bushcraft Ninja