Extrema Ratio Knives

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Folding knife Extrema Ratio Caimano Nero N.A. Ranger XXV Anniversary Limited Edition 04.1000.0166/BW/TM 9.3cm
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Folding knife Extrema Ratio Caimano Nero 9.3cm 0410000166BWTM
The Ranger XXV Anniversarium Limited Edition is a manual version of the Caimano Nero N.A. tactical knife, specifically designed for outdoor use with exceptional performance. This limited edition release consists of only 250 copies, adding to its exclusivity. The blade is crafted from durable Böhler N690 steel, ensuring reliability in various outdoor scenarios. The handle of the knife is constructed with two anodized anti-corrosion aluminum plates in a unique Tactical Mud color. The design incorporates an improved grip at the end of the handle for swift retrieval from the pocket. Additionally, a sturdy metal glass breaker is integrated for emergency situations. The DLC-coated titanium clip, adjustable at three different angles on both sides, is designed to minimize the protrusion of the handle when carried in the pocket. The Extrema Ratio Caimano N.A. Ranger XXV Anniversarium Limited Edition comes packaged in an IP67 certified waterproof polypropylene technical case. This case is equipped with a sealed flap, providing weather, dust, and shock resistance. 
€337.10

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Dagger Extrema Ratio Herring NE 04.1000.0319/BL-OR-N 16.7cm
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Fixed blade Knife Extrema Ratio Herring NE 16.7cm 04.1000.0319/BL-OR-N
Extrema Ratio Herring is one of the fan favorite military daggers. The dagger that entered the history of Italy during the World War II, thanks to the deeds of the young soldiers of the 1st Reconnaissance Squadron Folgore, armed with this weapon during Operation Herring. Extrema Ratio wanted to pay homage to this dagger while retaining the original design using most modern production techniques. The unique handcrafted finish on the handle mimics the aging of brass and gives the dagger a vintage look. The Herring NE version has an unsharpened cutting edge, which allows you to safely store this dagger.
€463.71

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Tactical knife Extrema Ratio Misericordia Ranger XXV Anniversarium Limited Edition 04.1000.0 11.8cm
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Fixed blade Knife Extrema Ratio Misericordia Ranger XXV Anniversarium Limited Edition 11.8cm 0410000479BW
The Misericordia Ranger XXV Anniversarium Limited Edition knife by Extrema Ratio is designed for outdoor use, marked by its outstanding features. The handle is ergonomically crafted from glass fiber reinforced nylon, ensuring maximum durability even in the most demanding conditions. The  spear-shaped blade is made from Böhler N690 steel.The Geotech Camo finish, a unique and innovative laser-engraved pattern by Extrema Ratio, not only contributes to its aesthetics but also showcases the brand's commitment to originality. This particular model, the Misericordia Ranger XXV Anniversarium, is released as a limited edition, with only 400 pieces available. It comes packaged in a weatherproof, dustproof, and shockproof polypropylene case. The comprehensive set includes a Kydex and nylon sheath, a special Extrema Ratio twenty-fifth-anniversary coin, and a limited edition progressive number metal plate. Weight 87 gr.
€280.65

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Folding knife Extrema Ratio BD4 Contractor Black 04.1000.0498/BLK 12.3cm
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Folding knife Extrema Ratio BD4 Contractor Black 12.3cm 04.1000.0498/BLK
Extrema Ratio BD4 Contractor is a black double-edged semi-serrated folding knife with a guard. The guard also acts as a flipper, and the high-speed auxiliary knife opening system makes it easy to use. The ergonomic handle uses anodized aluminum alloy and the stonewashed streamlined blade is made from Böhler N690 cobalt steel. The BD4 Contractor perfectly combines the elegance of classic Italian style with the functionality of an EDC folding knife.
€175.81

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Tactical knife Extrema Ratio T4000 C Satin 04.1000.0434/SAT 10.4cm
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Fixed blade Knife Extrema Ratio T4000 C Satin 10.4cm 0410000434SAT
The T4000 C Satin continues the purest Extrema Ratio tanto collection, for those who love Japanese profile blades but do not want to waive the typical tactical accessories like handle and sheath. The blade is durable Böhler N690 and the handle is convenient forprene. 
€206.44

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Tactical knife Extrema Ratio Fulcrum Bayonet Black
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Fixed blade Knife Extrema Ratio Fulcrum Bayonet Black 18cm 0410000301BLK
 This Tactical knife Extrema Ratio Fulcrum Bayonet Black is extremely versatile and strong, capable of sustaining loads of over 150 kilograms. Handle made of elastic Forprene material. The tanto-shaped blade allows for large amounts of work and wear while still keeping a sharp edge at its exceedingly sturdy tip. This feature, combined with a sharp false edge (in the military versions only), makes the knife retain sufficient combat penetration capability to engage targets covered in heavy clothing, paddings or soft ballistic protections. Thanks to its weight and top-heavy balancing, the FULCRUM BAYONET blade is suitable for hard work on the field.
€382.00

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Folding knife Extrema Ratio Caimano Nero N.A
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Folding knife Extrema Ratio Caimano Nero N.A. 9.3cm 0410000166BLK
It is the non-automatic version of the tactical knife that Extrema Ratio has supplied to the G.O.I. (Operational Raiders Group) of the Italian Navy. The blade is a 4 mm thick asymmetrical spear point. The serrated part of the edge allows to cut highly-resistant cables and fabrics without losing its sharpening. The bottom part of the handle is designed to enhance the grip for a rapid extraction of the knife from the pocket. It is also equipped with a hard-metal glass breaker. The DLC-coated titanium clip can be positioned in three different angles on both sides allowing to conceal the knife as much as possible inside the pocket.
€258.87

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Tactical knife Extrema Ratio Nimbus Ordinanza
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Fixed blade Knife Extrema Ratio Nimbus Ordinanza 14.1cm 04.1000.0240/BLK-OR
Extrema Ratio Nimbus Ordinanza 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 sturdy black Forprene handle provides a comfortable grip. The total length of the Nimbus Ordinanza combat knife is 263 mm (10.35 in) Kydex sheath included. Weighs 203 g. (7.16 oz)
€318.73

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Dagger Extrema Ratio Suppressor Trentennale GIS 04.1000.0312/BLK-30 17.6cm
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Fixed blade Knife Extrema Ratio Suppressor Trentennale GIS 17.6cm 04.1000.0312/BLK-30
Suppressor Trentennale from Extrema Ratio is the memorial dagger, issued to commemorate the thirtieth anniversary of the unit G.I.S., the renowned counter-terrorism unit of the Carabinieri (Italian military police). Suppressor Trentennale GIS is a commemorative limited and numbered series of 1000 daggers, bearing both historical and current unit logos. Comes in a hand-polished, clear plexiglass display case. Blade 176 mm (6,9 in), Böhler N690 steel. Weight 302 g (10.7 oz)
€631.45

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Folding knife Extrema Ratio BDØ R Ranger Green
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Folding knife Extrema Ratio BD0 R Ranger Green 6cm 0410000459GRN
Extrema Ratio BD0 R Ranger Green is a new knife designed for lightness. With an overall length of 5.7” (165 mm) and a weight of just  52 g the Extrema Ratio BDØ R is an extremely light and slim knife which makes it an ideal EDC choice. It is characterized by a very slim profile with a focus on lightness. The blade is made in Bohler N690 steel hardened to 58 HRC, 2.36” (60mm) long, 0.1” (2.5 mm) thick, with a plain sharpening and a faux edge on the first third of the spine. The blade is deployed by the usual “Razor” tang extension which enables effortless ambidextrous operation. A simple yet sturdy liner lock system holds the blade open. The reversible clip with lightening holes contributes to maintain the weight of the knife to a minimum. 
€78.23

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Tactical knife Extrema Ratio Silente
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Fixed blade Knife Extrema Ratio Silente 16.3cm 04.1000.0370/BLK
SILENTE is from “SICUT NOX SILENTES” the motto of the well-known N.O.C.S., Nucleo Operativo Centrale di Sicurezza, (Central Security Unit), the State Police counter-terrorism special Unit. SILENTE was submitted to the Unit, the Authorities, the Minister of Internal Affairs and the Chief of the State Police during the ceremony celebrating the N.O.C.S. 40th Anniversary. SILENTE is unique in its kind and it performs unique needs: the handle is crafted in two parts and it works also as the grip of a clamp placed at the end of the handle itself. Besides taking hold of everything that has the appropriate dimensions, the clamp can be used to cut wire-fences, wire-rods, steel cables, etc. and it can be used as a glass breaker thanks to the tungsten carbide insert placed at its end. The sheath protects the cutting part while using the clamp in safety, but it can also release the blade with a retention system that can be activated quickly and silently. It can be fastened at thigh or on M.O.L.L.E. system. It is integrated into the operator's equipment using minimum space.
€433.06

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Folding knife Extrema Ratio BD4 Contractor Desert 04.1000.0498/DW 12.3cm
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Folding knife Extrema Ratio BD4 Contractor Desert 12.3cm 04.1000.0498/DW
Extrema Ratio BD4 Contractor is a desert tan colored double-edged semi-serrated folding knife with a guard. The guard also acts as a flipper, and the high-speed auxiliary knife opening system makes it easy to use. The ergonomic handle uses anodized aluminum alloy and the stonewashed streamlined blade is made from Böhler N690 cobalt steel. The BD4 Contractor perfectly combines the elegance of classic Italian style with the functionality of an EDC folding knife.
€147.58

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Dagger Extrema Ratio Herring
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Fixed blade Knife Extrema Ratio Herring 16.7cm 0410000319BL-OR-A
Dagger Herring is one of the famous military knives. Its original name is Fairbairn-Sykes. Blade length is 167 mm. The unique handmade finish of the handle imitates the ageing of the brass and it gives the dagger a dated look, similar to the original one. Extrema Ratio Herring was developed in collaboration with 185th RRAO and adopted as a ceremonial commemorative dagger for the 20 years since the regiment’s constitution and 75 years since the Herring mission. Knife is equipped with a polymer case with historical frieze of the Squadrone F, leather / kydex sheath with brass point and two commemorative scrolls.
€475.81

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Dagger Extrema Ratio Adra SE 17 Stormo
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Fixed blade Knife Extrema Ratio Adra SE 17 Stormo 17.8cm 04.1000.0313/SAT-SE
Extrema Ratio Adra SE 17 Stormo dagger is a numbered, unlimited edition, with satinfinish blade 178 mm (7 in) and 17th Stormo logo, serrated partly.
The “Arditi Distruttori della Regia Aeronautica” (lit. royal air force brave destroyers) were an Italian battalion serving in the North African theater during WW2, and awarded two silver medals of honor.
This ADRA dagger, with its classic European shape, was designed for and with strong input from the commanders and operatives of the 17th. Comes in a wooden case, including a parade belt sheath. Total length 311 mm (12.2 in). Weight 331 g (11.7 oz) 
€644.35

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Tactical knife Extrema Ratio 39-09 Special Edition
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Fixed blade Knife Extrema Ratio 39-09 Special Edition 19.5cm ER33039-09SPED
This Extrema Ratio 39-09 Special Edition is the result of a project sponsored by COFS (the inter-force operations command for Italian special forces) and its former Commander-in-chief, Gen. Bertolini – not to mention advocated for by knife collectors worldwide – this combat knife 39-09 is a restyling of the Model 1939 “paracadutista assaltatore” (assault paratrooper) knife, a celebrated piece of Italian military history. The included hard sheath is designed to be worn at the ankle, in the characteristic fashion of Italian paratroopers. The 39-09 SPECIAL EDITION version, numbered, unlimited edition, has wooden hilt, satin-finish blade and details and COFS logo & motto. It comes in a black wooden case, including a parade belt sheath. The C.O.F.S. logo and motto engraved.
€650.81

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Fixed blade Knife Extrema Ratio Selvans Desert no Kit
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Fixed blade Knife Extrema Ratio Selvans Desert no Kit 16cm 0410000129BLK-DNK
The Selvans Desert was developed as a cooperation between Extrema Ratio and the Master Advanced Instructor Daniele Dal Canto. It’s a modification of the ONTOS – a military survival knife – designed to enhance its effectiveness as a civilian tool. A longer handle and a heavier blade enable enhanced chopping and cutting action. 
€362.10

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Fixed blade Knife Extrema Ratio Selvans Expeditions
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Fixed blade Knife Extrema Ratio Selvans Expeditions 16cm 0410000129EXP
This reliable, tactical knife Extrema Ratio Selvans Expeditions is extremely versatile and strong. The blade is made of  Böhler N690 steel, covered with Black Oxide MIL-C-13924. The handle is made of Thermoplastic Elastomer. This material has a good abrasion resistance and high thermal and electric insulation values. Included fire stick. It comes with a MOLLE compatible Cordura sheath with leg strap. 
€342.74

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Fixed blade Knife Extrema Ratio Satre S600 Black 0410000222BLKS6 6.8cm
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Fixed blade Knife Extrema Ratio Satre S600 Black 6.8cm 0410000222BLKS6
The Extrema Ratio Satre S600 Black is a pocket-sized, light and extremely resistant fixed blade knife. Given its characteristics, it can be employed in a large variety of activities and fields, including survival and bushcraft, or it can be part of an EDC. It was designed in collaboration with Daniele Dal Canto, a Master Advanced F.I.S.S.S. instructor (Italian Federation of Sport and Experimental Survival). It can be worn as a neck knife thanks to its Paracord 550 lanyard.  The pre-shaped Kydex sheath has eyelets, allowing to apply both lanyard and accessory holder. This allows to clip the sheath together with not only belts, but also pockets, trousers, jackets, shirts and t-shirts. ULTICLIP gives the possibility to position the knife both vertically and horizontally and allows a more accessible use for left and right handed. The full-tang skeletonized structure allows the customization of the knife by using the Paracord as an handle cover. This Satre is made with Böhler S600 steel, which is thermally and cryogenically treated in order to obtain an exceptional hardness of 64 HRC. This material was chosen for its resistance to oxidation, for the durability of its edge and especially for its reliability, which has been proven over the years. 
€128.23

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Fixed blade Knife Extrema Ratio Satre Black 0410000222BLK 6.8cm
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Fixed blade Knife Extrema Ratio Satre Black 6.8cm 0410000222BLK
 The Extrema Ratio Satre Black is a pocket-sized, light and extremely resistant fixed blade knife. Given its characteristics, it can be employed in a large variety of activities and fields, including survival and bushcraft, or it can be part of an EDC. It was designed in collaboration with Daniele Dal Canto, a Master Advanced F.I.S.S.S. instructor (Italian Federation of Sport and Experimental Survival). It can be worn as a neck knife thanks to its Paracord 550 lanyard.  The pre-shaped Kydex sheath has eyelets, allowing to apply both lanyard and accessory holder. This allows to clip the sheath together with not only belts, but also pockets, trousers, jackets, shirts and t-shirts. ULTICLIP gives the possibility to position the knife both vertically and horizontally and allows a more accessible use for left and right handed. The full-tang skeletonized structure allows the customization of the knife by using the Paracord as an handle cover. Satre is made with heat-treated Böhler N690 steel at 58 HRC. This material was chosen for its resistance to oxidation, for the durability of its edge and especially for its reliability, which has been proven over the years. 
€116.94

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Folding knife Extrema Ratio Nemesis 04.1000.0154/BLK 11.5cm
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Folding knife Extrema Ratio Nemesis 11.5cm 04.1000.0154/BLK
Extrema Ratio Nemesis is a functional black self-defense folding knife. The design of this knife is similar to the M.P.C. model, but with a greater emphasis on defense. The blade is rather thick, strong and sharply sharpened. The front guard prevents the hand from slipping onto the blade. The long handle protrudes from the hand, allowing the knife to be used for non-lethal blows. The safety lock holds the lever of the Lockback mechanism, preventing accidental unlocking of the blade during heavy use. It can also be used to lock the knife in the closed state in case it was taken from the owner: then the Nemesis cannot be opened, even if the mechanism is irretrievably damaged. The hardened steel tip can be effectively used as glass-breaker. There is a lanyard hole on the handle. Extrema Ratio Nemesis is a knife with a pronounced Italian character.
€347.58

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Folding knife Extrema Ratio Resolza 10 Black 04.1000.0168/BLK 10cm
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Folding knife Extrema Ratio Resolza 10 Black 10cm 04.1000.0168/BLK
Extrema Ratio Resolza 10 is a folding knife that pays homage to centuries of Italian tradition. The traditional Sardinian resolza is one of the most famous knives in Italy. To this day, it is a constant companion of island farmers and shepherds in their daily work. The knife accompanied them even when people were called to war: in the chronicles of Sassari during the First World War, the knife is mentioned as part of soldiers' equipment. Resolza 10 is an attempt to redefine the traditional silhouette in accordance with the modern Extrema Ratio standards, so as not to overlook the Sardinian craftsmen, who still practice ingrained knife-making techniques and preserve ancient traditions. Resolza 10 retains its original dimensions and proportions, but is manufactured using high quality materials and modern company technologies. The handle has been redesigned, and the blade is more closely approximated to the traditional shape.
€159.68

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Folding knife Extrema Ratio BD4 R Black 04.1000.0496/BLK 12.2cm
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Folding knife Extrema Ratio BD4 R Black 12.2cm 04.1000.0496/BLK
Extrema Ratio BD4 R is a basic folding knife made in full black. The BD4 R perfectly combines the elegance of classic Italian style with the functionality of a folding knife for every day. The high-speed auxiliary knife opening system makes it easier to use. The streamlined blade is made of Böhler N690 cobalt steel, and the ergonomic handle uses anodized aluminum alloy.
€134.68

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Tactical knife Extrema Ratio MK2.1 Black 04.1000.0128/BLK 17.7cm
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Fixed blade Knife Extrema Ratio MK2.1 Black 17.7cm 04.1000.0128/BLK
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.
€325.81

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Folding knife Extrema Ratio HF2 T Black 04.1000.0452/BLK 12.4cm
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Folding knife Extrema Ratio HF2 T Black 12.4cm 04.1000.0452/BLK
Extrema Ratio HF2 tanto version. Extrema Ratio HF2 folding knife is projected for those who are looking for sturdiness and reliability of a fixed blade but also for compact sizes. Its N690 steel blade is available with Drop or Tanto point. For standard use the well known liner lock is enough safe. In case of hard extreme works it is requested to insert the steel pin in the proper hole to cross the handle and the blade, obtaining in this way a sturdy and reliable knife as much as a fixed blade. The steel clip can be removed or even placed on the opposite site of the handle by replacing it with the second supplied clip. It comes in four different versions: HF2 D BLACK, HF2 D DESERT WARFARE, HF2 T BLACK, HF2 T DESERT WARFARE.
€307.26

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Extrema Ratio knives are a part of equipment of many special military units of Italy, the police and rescue services. Each model is developed very carefully and undergoes a series of rigorous tests before it is put into production. Extrema Ratio cooperates with the University of Perugia, where scientists conduct a number of studies determining the ergonomics of Extrema Ratio products and methods for improving it. The office of Extrema Ratio is located in Prato, Italy. Both Extreme Ratio tactical knives and EDC knives are distinguished by impeccable quality. Most knives are made of Austrian steel N690, which is famous for its high content of molybdenum and cobalt and is highly corrosion resistant. Due to this, N690 steel has increased strength and resists shock loads well. The most popular Extrema Ratio knives are Fulcrum, Col Moschin, RAO, Adra and others. Extrema Ratio also produces several lines of tactical folding knives: BF (basic folder), MF (medium folder), BD4, BD2 series and other knives. In our store you can buy Extrema Ratio tactical knives, as well as folding and EDC knives of this brand. MyGoodKnife is the official distributor of Extrema Ratio.