重力刀(Gravity Knife),用单手打开保险后,押住保险且将头朝下,此时刀刃便会受重力影响而从握柄中掉出,十分简单但耐用/实用的设计;[1]

参见条目

参考文献

  1. ^ Langston, Richard. Collector's Guide to Switchblade Knives: An Illustrated Historical and Price Reference. Boulder, Colorado: Paladin Press. 2001: 224. ISBN 1581602839.