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Cuchillos y Navajas Extrema Ratio
Extrema Ratio es una marca italiana de cuchillos tácticos, fundada en 1997. La empresa desarrolla cuchillos para uso militar, policial, de rescate y actividades al aire libre. Extrema Ratio suministra oficialmente cuchillos a las fuerzas armadas y de seguridad italianas, y cuenta con la certificación ISO 9001 y el código de proveedor de la OTAN.
Puedes comprar cuchillos Extrema Ratio originales en MyGoodKnife; nuestra tienda es distribuidora oficial de la marca. Nuestra selección incluye cuchillos tácticos plegables y cuchillos de hoja fija de las populares series de Extrema Ratio: Col Moschin, Fulcrum, RAO, Caimano Nero, Dobermann, Selvans, Misericordia, S-THIL, entre otras.
Hay 190 products.
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Extrema Ratio MK2.1 is a re-issue of the Mark 2 combat dagger, one of the most common knives during World War II. The aim was to preserve the characteristic properties of the original, making only those changes that would increase its effectiveness. The blade is made of Böhler N690 cobalt steel, the rest of the parts are made of AISI 303 and AISI 304, and the handle uses fiberglass-reinforced nylon instead of leather. The MK2.1 retains the ergonomics of the original Mark 2, while all of the frame parts have been enlarged to provide a robust, high-performance multi-tool. The most significant changes are aimed at eliminating the known "weak points" of the original knife: the ability to disassemble in the field without the tools, a straightened modified Bowie profile, which makes it easier to maintain the edge, and recesses on the handle that help to correctly orient the blade in the dark and increase the grip during rotational movements. Lanyard hole and front guard holes have also been added. The kit includes a standard hip-mount sheath.
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Training knife Extrema Ratio TK S 2 GOI with 142 mm blade. Weight 173 g. Training knives enable martial arts practitioners and professionals to train different combat techniques with an appropriate and dedicated tool. All training knives are produced in a metallic blue colour which makes them easily identified even when sheathed. The blades are produced from anodized aluminum and have the very same shape and size of the Extrema Ratio standard production models. The handles are the same used in Extrema Ratio´s production models. The sheaths, sold separately, are the same used for the real knives. The stiff blade allows for training complex defensive and disarming techniques. We recommend the use of appropriate protective gear when training.
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Extrema Ratio MF0 D Black Rough folder is “the little one” amongst MF knives. Basically it is a compact version of the MF1. It retains all the characteristics of MF1 but has a downsized handle and shortened blade, similar to our SHRAPNEL “back-up” knife. This versione is produced with a rough handle for a better grip. The drop point blade 68 mm is made of Bohler N690 stainless steel (58HRC). Black aluminum handle.
MF stands for Medium Folder: a product line positioning itself between the BF (Basic Folder) and the Heavy Folder lines. MF knives employ the LINER-LOCK mechanism and are distinguished for their sturdiness; all are equipped with a glass-breaker. An innovative supplementary screw can be unlocked to enable fine-tuning of the main screw, adjusting opening speed to taste. Hemispheric milling marks on handles make it easier to change from saber-style to reverse grip. Clips are reversible. Overall length 181 mm. Weight 139 g. Made in Italy.
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Extrema Ratio Task Compact Black fixed knife in a compact size. The blade 110 mm (4.3 in) made of Böhler N690 steel, black burnishing finish. Handle Forprene with lanyard hole. Knife comes with hard belt sheath and BELT-CLIP. The sheath can be worn vertically, horizontally or obliquely (at a 45° angle). Overall length 214 mm (8.4 in). Weight 205 g (7.2 oz).
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Extrema Ratio Nimbus Operativo is a modern version of the Second World War Italian Nimbus assault knife. The black blade 141 mm (5.55 in) is made of Böhler N690 steel. The black Forprene handle provides a comfortable grip. The total length of the Nimbus Operativo combat knife is 263 mm (10.35 in) Kydex sheath included. Weighs 203 g. (7.16 oz)
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Extrema Ratio Arditi is a modern version of the First World War Italian Arditi assault knife. The black blade 167 mm (6.57 in) is made of Böhler N690 steel. The sturdy black polymer handle provides a comfortable grip. The total length of the Arditi knife is 270 mm (10.62 in) Cordura sheath included. Weighs 224 g. (7.90 oz)
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The new Extrema Ratio BF0 is the smallest among the Basic folders. Its handle produced in technopolymer makes it light and resistant, also thanks to its steel internal frame. The liner lock system enables to open and close it with one hand. It comes with drop blade and stone washed finishing. There are only best folding knives in MyGoodKnife's range.
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The restyling of a classical, a tribute to a veteran, one of the most distributed and used knives during World War II : MARK 2. It was produced in many versions by historical US knives manufacturers but always following the original specs given by the U.S. NAVY. It is the preferred tool among traditionalists who only trust “battle tested" knives. Throughout the years several manufacturers have tried to restyle this knife with little success. It is in fact the original model which is still favoured in the main catalogues. Extrema Ratio’s aim, in this ambitious project, is to keep the original characteristics while developing only functional changes to increase performance. Cobalt reinforced stainless steel is used for the blade, AISI 303 and AISI 304 are used for the other components. The rounded leather handle has been replaced with a fibre glass reinforced nylon handle. The ergonomics of the original knife has been left intact while all structural parts have been oversized to obtain a sturdy versatile knife. The most important changes have been made to solve the so called “weak spots” of the original version. 1.the possibility to disassemble the knife in the field without the need of tools; 2.the Bowie shape was straightened for easy sharpening; 3.the grooves in the “barrel” shaped handle help to find proper blade direction even in dark conditions; 4.the same grooves improve the grip during twisting movements Other small modifications were to add holes on the back tang to add a lanyard and on the front guard to tie the blade on a pole to be used as a spear. For purely estethical reasons the traditional bloodgroove has been “cowardly” replaced with the typical Extrema Ratio “side groove”. The original knife was perfect and no other modifications were needed. The first available versions will be the classic Extrema Ratio Black and the new Desert Warfare which will come with a special HCS coyote sheath specifically developed for SOF units. The black version comes with standard side sheath which includes automatic retention system, protective flap and is M.O.L.L.E. compatible.
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Commissioned and officially adopted in 2002 by the Ninth Rgt. Incursori "Col. Moschin", this model is the quintessence of a pure combat knife. Inspired by daggers with an asymmetric blade and straight but slightly orientated handle used by the Arditi, in whose footsteps the Col Moschin Regiment follows, it has been re-elaborated in a modern form, endowed with a double edged blade, (single for the civilian version), integral guards and a removable E.R.M.H. handle in Forprene. Both grindings are hollow grind razor sharp. The centre of gravity is towards the end of the handle, the point especially sharp, it is light, manageable and intuitive. Each new Incursore receives one, and each new Incursore is trained to use it in the best way.
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Los cuchillos Extrema Ratio forman parte del equipamiento de muchas unidades especiales militares en Italia, así como de la policía y los servicios de rescate. Cada modelo se desarrolla con gran cuidado y pasa una serie de pruebas rigurosas antes de entrar en producción. La empresa colabora con la Universidad de Perugia, donde los científicos realizan estudios para evaluar la ergonomía de los productos Extrema Ratio y métodos para mejorarlos. Tanto los cuchillos tácticos como los de uso cotidiano de Extrema Ratio se distinguen por una calidad impecable. La mayoría de los cuchillos están fabricados con acero austriaco N690. Extrema Ratio utiliza Böhler N690 por su fiabilidad y comportamiento predecible. Este acero es conocido por su alto contenido de molibdeno y cobalto y por su alta resistencia a la corrosión. Gracias a ello, el acero N690 ofrece gran resistencia y soporta bien las cargas de impacto, lo que es especialmente importante para el uso táctico.
Modelos populares de cuchillos Extrema Ratio
Los cuchillos Extrema Ratio más populares son Fulcrum, Col Moschin, RAO, Adra. Extrema Ratio también produce varias líneas de cuchillos plegables tácticos: BF (basic folder), MF (medium folder), y las series BD4 y BD2. Los modelos plegables también pueden utilizarse en entornos urbanos.
Preguntas frecuentes sobre los cuchillos Extrema Ratio
¿Qué significa Extrema Ratio?
Extrema Ratio significa en latín «medidas extremas». El nombre refleja la filosofía de la marca: cuchillos diseñados para situaciones donde la máxima fiabilidad, control y preparación para condiciones extremas son esenciales.
¿Dónde se fabrican los cuchillos Extrema Ratio?
Los cuchillos Extrema Ratio se fabrican completamente en Italia. La empresa está ubicada en Prato y controla todo el proceso, desde el desarrollo hasta el ensamblaje. La marca es proveedor oficial de fuerzas militares y estructuras de seguridad y cuenta con certificación como proveedor de la OTAN.
¿Qué cuchillo Extrema Ratio utilizan los militares?
Uno de los modelos más conocidos es Col Moschin, desarrollado para el 9º regimiento paracaidista de asalto de las fuerzas especiales italianas. También se utilizan modelos como Fulcrum, Requiem y otros cuchillos diseñados para tareas específicas.
¿Vale la pena comprar cuchillos Extrema Ratio?
Si necesitas un cuchillo muy resistente y fiable para tareas tácticas, outdoor o uso intensivo — sí. Extrema Ratio es una herramienta con un alto margen de resistencia, diseñada para uso real. Los cuchillos Extrema Ratio también destacan por una calidad de fabricación excepcional. Durante muchos años de trabajo de nuestra tienda, esta marca tiene el menor número de reclamaciones de clientes por calidad de los productos.
En la tienda online MyGoodKnife puedes comprar cuchillos Extrema Ratio originales — somos distribuidor oficial de la marca y ofrecemos solo productos auténticos con envío a todo el mundo.