The first modern tactical folding knife was the AMK SERE co-designed by Al Mar and LTC James "Nick" Rowe founder and commanding officer of the U.S. Army SERE School at Ft. Bragg, North Carolina. This was the first specifically designed, developed, produced, then distributed folding knife meant for tactical application and utility work via a design and mission matrix. It was first provided to selected members of our special operations forces then released as a general public cutlery item.
Fighting Knives Magazine was the first publication to coin the now common use term "tactical folder" and to promote this term. Ernest Emerson, Alan Elishewitz, and Al Mar were among those noted and promoted early on as tactical folding knife gurus.
One of the first production folders to be formally promoted and encouraged by a writer on bladework was a Gerber folding knife carried by SOF writer David Steele. Steele's work with this folder, and advocacy of it as a "tactical" knife encouraged my purchase of this model (FSII?) in the mid 1970s.
The Buck 110 certainly can claim a rightful place as perhaps the best known "tactical folder", or perhaps more accurately as a folding fighting knife. However, it was not the military that encouraged and popularized this aspect of Buck's big utility folder but the Hell's Angels during their heyday of the 1960s and their preference for carrying, to include creating a speed opening sheath for the folder, the 110.
Kasik sends -