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Black Ops OTF Double Action Automatic Switchblade Flick Knives Black Ops OTF Double Action Automatic Switchblade Flick Knives BÖKER OTF Double Action Automatic Switchblade Flick Knives BÖKER OTF Double Action Automatic Switchblade Flick Knives AKC Italy OTF Double Action Automatic Switchblade Flick Knives AKC Italy OTF Double Action Automatic Switchblade Flick Knives
Delta Force OTF Double Action Automatic Switchblade Flick Knives Delta Force OTF Double Action Automatic Switchblade Flick Knives Lightning OTF Double Action Automatic Switchblade Flick Knives Lightning OTF Double Action Automatic Switchblade Flick Knives Microtech OTF Double Action Automatic Switchblade Flick Knives Microtech OTF Double Action Automatic Switchblade Flick Knives
Piranha Excalibur OTF Double Action Automatic Switchblade Flick Knives Piranha Excalibur OTF Double Action Automatic Switchblade Flick Knives  

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 


Bundeswehr Type 4 Fallschirmjäger-Messer German Paratrooper Gravity OTF Knife
Bundeswehr Type 4 Fallschirmjäger-Messer German Paratrooper Gravity OTF Knife

Out The Front DOUBLE ACTION Knives Open with trigger and close with the trigger.  They are sometimes referred to as DUAL ACTION.

The first Double Action model is American from the late 1950's

1958-Braverman-Patent#2,854,745 In/Out Spring Knife

The trigger is is used to automatically open the knife and to automatically close the knife.

Out The Front SINGLE ACTION Knives Opens with trigger but are manually closed by a cocking rod or a lever.

The first Single Action OTF knives are American made from the late 1800's

1866-Hibbard-Patent#57,902- Compressed Spring OTF
1884-McGovern-Patent#309,863-Compressed Spring OTF Knife
1907-Jenkins-Patent#845,792- Compressed Spring Knife

The model that polarized the single action model is the Dalton Cupid and it's copied idea the Smith & Wesson Extractor 1600.  These are the one if not the most copied automatic knife design in history.  This Knife is Famous For Being Heath Ledger’s Joker Knife from Batman.

Out The Front Gravity Paratrooper Knives use gravity to deploy the blade or centrifugal force.

The earliest Gravity Knives are from the 1800's and are American Designed.

1862-Wisner-Patent#35,964- Gravity Knife
1871-Lyman-Patent#110,986- OTF Knife
1876-Evens-Patent#174,417 - Gravity Knife
1877-Scholfeild-Patent#187,051- OTF Gravity Knife
1877-Manuel-Whitehouse-Patent#191,063- OTF Gravity Knife
1881-Rischow-Patent#242,985- Gravity Knife
1881-Kayser-Patent#243,071- Gravity Knife
1882-Fiske-Patent#255,847- Gravity Knife
1883-Lincoln-Patent#286,209- Gravity Knife
1884-Kaldenbach-Patent#292,917- OTF Gravity Knife
1884-Heysinger-Patent#307,767- OTF Gravity Knife-"Novelty"
1885-Rockwell-Patent#317,208- OTF Gravity Knife
1886-Pusey-Patent#338,612- OTF Gravity Knife
1886-Hunt-Patent#407,863- OTF Gravity Knife
1891-Franklin-Patent#456,087-OTF Gravity Knife
1892-von Bultzingslowen-Patent#472,104-Gravity Knife
1892-Billings-Patent#470,77-Gravity Knife
1892-Franklin-Patent#457,306-OTF Gravity Knife
1894-von Bultzingslowen-Patent#515,743-Gravity Knife
1894-Cook-Patent#515,743-Gravity Knife
1896-Gardener-Patent#569,452-OTF Gravity Knife

There are FIVE Types of Paratrooper Gravity Knives from Germany

Type I Flieger Kapp Messer WWII era (1937 - 1941)
Made by Paul Weyersberg & Co., SMF Solingen, F. & A. Helbig Steinbach and various others.

Type II Flieger Kapp Messer WWII era TAKE DOWN VERSION (1941 - end of WWII)
Made by Paul Weyersberg & Co., Weyersberg also made models marked with example: `RB Nr.0/0561/0020

Type III Flieger Kapp Messer TRAP DOOR (1955 - 1961)
Made by Eickhorn & Anton Wingen

Type IV Flieger Kapp Messer TAKE DOWN VERSION (1961 - 1979)
Made by WMF, OWF & Eickhorn

Type V Flieger Kapp Messer LL80 TAKE DOWN VERSION (1979 - Present)
Made by Eickhorn, & Eickhorn for Colt