In Battle Blades, author Greg Walker identifies Harsey as producing superb edges and blade finishes on his knives, as well as making knives specifically for Al Mar and Colonel Rex Applegate.
Rex Stout | Rex Ryan | Rex Harrison | Christina Applegate | Rex Allen | Rex Hunt | Erreway en Grand Rex | Rex Hagon | Rex Beach | Rex Records | Rex Murphy | Rex (Live at the Fillmore) | Rex Applegate | Rex | SS Rex | Rex Williams | Rex Linn | Rex Lassalle | Lindsay Applegate | Debby Applegate | SS ''Rex'' | Simon Rex | Rex Whistler | Rex Wailes | Rex Van de Kamp | Rex T. Barber | Rex Sorensen | Rex Salas | Rex Reed | Rex Mundi |
Al Mar Knives has collaborated with a number of knife makers, martial artists, and military tacticians including Rex Applegate, Nick Rowe, Bob Taylor, Bill Harsey, Jr., and ABS Mastersmith Kirk Rexroat.
The origin of the term is obscure, but the belly gun's modern formulation dates from the first half of the Twentieth Century, and can be attributed to a small group of men, most with military backgrounds: Colonel Rex Applegate, Major Eric A. Sykes, Lieutenant-Colonel William E. Fairbairn, pistolsmith John H. Fitzgerald, and perhaps most prominently Colonel Charles Askins.