Switchblade
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A switchblade is a pocketknife with a sliding or pivoting blade contained in the handle which is extended automatically by a spring when a button, lever, or switch on the handle or bolster is activate
A side opening (left) and out the front (OTF) knife
Benchmade 4300 CLA Composite Lite Auto. Auto knife push button operation with side mounted safety, reversible clip. Length 7.85 in (19.9 cm) Blade length 3.4 in (8.6 cm). Blade Material CM154.
Pocket knife made by Flylock Knife Company of Bridgeport, Connecticut with two spring-loaded, button activated blades. Scales are made of horn. Measures 3 3/8" (86 mm) closed. These were manufactured from 1918 to 1929.
Italian stiletto
Ballistic knife
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A ballistic knife is a knife with a detachable blade that can be ejected to a distance of several meters by pressing a trigger or operating a lever or switch on the handle. Spring-powered ballistic kn
Switchblade
…of Columbia, Puerto Rico, and other territories. The act was amended in 1986 to also prohibit the importation, sale, manufacture, or possession of ballistic knives in interstate commerce. U.S.C. 1716 prohibits the mailing or transport of switchblades or automatic knives through the U.S. mails (U.S. Postal Service…
U.S. made spring-powered ballistic knife