The gunstock pattern is an unusual, attractive and collectible pocket knife.  They are typically smaller jack knives whose frame resembles the stock of a rifle.

Ulster knife co gunstock pocket knife
Ulster Knife Co gunstock jack with bone handles

The bottom side of the frame is flat but the top side tapers towards the blade end starting at the center.  Collectible gunstock jack knives have been made by many companies such as Case, Camillus, Ulster, Schatt & Morgan and more!  I appreciate any traffic from these links as I earn commission when an item is purchased, at no extra cost to you. THANK YOU!!!   – Jesse, oldpocketknives.com