Sport, Military and Collectible Knives | Coltelleria Collini
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ExtremaRatio - Estrema Axe - Dark Stone N690Co & Black G-10 - Emergency Breaching Tool
The axe has spanned history as a symbol of power, versatility, and innovation. From work tool to fearsome combat weapon, its evolution has accompanied ancient and modern civilizations.
Today, Extrema Ratio pays tribute to this tradition with Estrema, a tactical axe developed for the G.O.I. (Naval Operational Incursors Group), which blends state-of-the-art materials and functional design to meet the most extreme challenges.
Intended Use: Heavy Utility
Production type: Industrial
Country of manufacture: Italy
Blade: full tang in N690Co 54HRC stainless steel
Surface treatment: Dark Stone
Handle: G-10
Blade length: 80mm.
Blade thickness: 6.3mm.
Total length: 374mm.
Balance: advanced
Weight: 777g.
Sheath: kydex, MOLLE compatible
Packaging: technical, airtight, polymer case
Notes: -Millennial heritage, modern innovation.
From the earliest times, the axe has embodied a duality between work tool and combat tool, evolving over the years to become a symbol of power and versatility. Its use as a work tool dates back to 6,000 B.C., while the earliest documented war use is between 700 and 600 B.C. during Etruscan times, as certified by the Auvele Felùske stele at Vetulonia.
Throughout the world, from Europe to Ancient Egypt to the Far East, the battle axe has been distinguished by its immediate effectiveness in combat, requiring less complex training than other tools but providing decisive performance in close quarters situations. EXTREMA RATIO, an official supplier to the Comsubin, reinterprets this age-old tradition with ESTREMA, a tactical battle axe developed for the G.O.I. (Naval Operational Incursors Group).
With a state-of-the-art design, ESTREMA combines the strength and speed of the historic weapon with technological innovation, offering a versatile and reliable tool for the most demanding missions. Suitable as both a tactical combat tool and a breacher tool, ESTREMA is designed to meet any challenge. The name “ESTREMA” expresses the nature of this model: our most extreme product, the result of our boldest manufacturing experience.
ESTREMA is made of Böhler N690 steel with 54 HRC hardness and dark stone finish. The G10 material handle offers two modes of use: grasping the end section of the handle provides the traditional grip, while a narrower grip encourages close use. The tang, in its end section, can be used as a burglary tool and for cutting and opening metal sheets. In addition, the tapering allows the axe to be used as a lever or crowbar.
ESTREMA can be equipped with a hammer (hammering mass) made of hardened and tempered carbon steel, which engages and disengages from the axe's pike via a snap mechanism with a safety catch to prevent accidental disengagement. This solution, the first of its kind applied in this context, makes the axe even more versatile. The rear hammer is an optional accessory that can be purchased separately.
ESTREMA comes in an innovatively designed airtight technical case, inside of which is also a Kydex sheath and belt clip.
The Kydex sheath, which is ambidextrous, is designed to offer different carrying modes and provide numerous interface options with the operator's equipment. It can be clipped to the belt using the belt clip included in the case, or attached to any MOLLE-equipped platform using a paracord lanyard. Axe retention is ensured by the natural conformation and elasticity of Kydex, supported by a lanyard secured with snaps.
ER-ESTR-AXE€790.00Only 99 leftOnly 99 left
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Sog - Recon Government S21 rare knife - blued blade - Made in Japan - PRIVATE COLLECTION
KNIFE FROM PRIVATE COLLECTION
* Type: Previously Purchased
* Condition: Overall in excellent condition
* Availability Discontinued
* Sharpening: Factory edge
* Blade marks: No
* Handle marks: No
* Box: -
* Sheath: Present - Original
* Manuals, Certificates and Warranty: -
* Checked and certified by our internal laboratoryThe SOG Recon Government S21 is an extremely rare variant of the Government model, produced between the 1990s and early 2000s, when SOG was among the world reference brands in outdoor and military cutlery. This version stands out for its dark blade finish.
Unlike the standard Government S13 in stainless steel, the Recon Government uses SK-5 carbon steel, required for the gun-blued treatment, not applicable to stainless steels. This makes it a technically different model.
Produced as an alternative variant of the series, today it is considered an extremely rare knife with almost no availability on the collector market.
Technology and materials
SK-5 steel blade with gun-blued finish that reduces reflections and protects the surface. Hardness 57-58 HRC for a good balance between strength and sharpenability. Black Kraton handle for a secure grip.
Solid construction with steel guard and pommel, consistent with the Government series for heavy-duty use.
Technical specs
Blade: Plain edge, gun-blued finish
Steel: SK-5 carbon steel
Hardness: 57-58 HRC
Handle: Black Kraton
Blade length: 15,9 cm
Total length: 28,6 cm
Blade thickness: 4,6 mm
Weight: approx. 240 g
Sheath: Nylon
Production: Japan
Product code: S21
Production period: 1990 - 2002
Discontinued model, among the rarest in the SOG Government series.SOG-S21AP€0.00Only 0 leftOnly 0 left
Out of stock -
Mission - MTK-Ti Knife - Half Serrated Beta Titanium & Black G10 - PRIVATE COLLECTION - Knife
RETIRED KNIFE FROM PRIVATE COLLECTION
* Provenance: Withdrawn from a private individual, previously purchased
* Condition: Iconic knife from the early 2000s, never used, in very good condition (typical signs of wear of this model and material given by rubbing with the sheath)
* Available on the market: Difficult to find and not in this configuration
* Sharpening: Professionally sharpened
* Blade marks: Typical wear marks of this model and material, given by rubbing with the sheath
* Signs on handle: None
* Box: -
* Sheath: Present and in excellent condition, Made in USA by SpecOps
* Manuals, Certificates and Guarantees: -
* Controlled and Certified by our in-house laboratoryIntended use: Multi-role
Type of Production: industrial
Blade: Full Tang in Titanium Beta, with micro-balled finish
Country of production USA
Grip: Black G10
Blade length: 130mm.
Blade thickness: 6.3mm.
Total length: 255mm.
Weight: 243g.
Sheath: Made in USA by SpecOps, in coyote colored Nylon, belt, MOLLE compatible, with thermoformed Kydex inner part
Packaging: -
Note: Previously purchased knife, from private collection - iconic product from the early 2000sMTKTI-CP€0.00Only 0 leftOnly 0 leftOut of stock -
Mission - MPS 10-Ti Half Serrated - Beta Titanium Knife - PRIVATE COLLECTION - Knife
KNIFE WITHDRAWN FROM PRIVATE COLLECTION
* Origin: Withdrawn from a private collection, previously purchased
* Condition: Iconic knife from the early 2000s, never used, in excellent condition (signs of wear typical of this model and material due to rubbing against the sheath)
* Available on the market: Out of production
* Sharpness: Factory sharp
* Marks on blade: Signs of wear typical of this model and material, due to rubbing against the sheath
* Marks on handle: N/A
* Box: Present and in excellent condition
* Sheath: Present and in excellent condition, never used, with normal signs of age
* Manuals, Certificates, and Warranties: /
* Checked and Certified by our in-house laboratoryMISSION beta titanium knives are high-quality tools designed to withstand the most extreme conditions.
Made from a special beta titanium alloy, these knives combine exceptional lightness, corrosion resistance, and strength. MISSION developed these knives to ensure durability and reliability in extreme environments, such as the sea or high temperatures, and they are virtually indestructible. The main feature of these knives is their ability to remain perfectly usable even after intensive use.
The knives have been tested and selected by the US Navy SEALs, who have used them in sensitive missions and special operations. Thanks to their incredible strength, ease of maintenance, and reliability, they have become a benchmark for special forces professionals and enthusiasts of high-end outdoor equipment.
Intended use: Multi-purpose / Diving
Type of production: Industrial
Blade: Beta Titanium with micro-shot peened finish
Country of manufacture: USA
Handle: Beta Titanium with micro-shot peened finish
Blade length: 125mm.
Blade thickness: 6.3mm.
Total length: 248 mm.
Weight: 151 g.
Sheath: thermoformed Kydex, with removable nylon belt loop for vertical carry on belt.
Packaging: cardboard box with Mission Knives logos.
Notes: previously purchased knife from a private collection - discontinued, iconic product from the early 2000s.MPS10TI-CP€0.00Only 0 leftOnly 0 leftOut of stock -
Mission - MPK12-Ti Half Serrated - Titanium Beta & Hytrel - PRIVATE COLLECTION - Knife
KNIFE WITHDRAWN FROM PRIVATE COLLECTION
* Provenance: withdrawn from a private collection, previously purchased.
* Condition: Iconic knife from the early 2000s, used, but overall in excellent condition
* Commercially available: Discontinued
* Sharpening: Factory sharpened, can be improved.
* Marks on blade: Signs of wear typical of this model and material, given by rubbing against the sheath
* Marks on handle: None, normal workmanship marks found on all these models.
* Box: /
* Scabbard: Present, in very good condition, with normal signs of workmanship present on all of these models.
* Manuals, Certificates and Warranties: /
* Checked and Certified by our in-house laboratory.
MISSION beta titanium knives are high-quality tools designed to withstand the most extreme conditions.Made from a special beta titanium alloy, these knives combine exceptional lightness, corrosion resistance and strength. MISSION developed these knives to ensure durability and reliability in extreme environments, such as the sea or high temperatures, and they are virtually indestructible. The main feature of these knives is their ability to remain perfectly usable even after heavy use.
The knives have been tested and selected by U.S. Navy SEALs, who have used them in sensitive missions and special operations. Because of their incredible durability, ease of maintenance, and reliability, they have become a benchmark for special forces professionals and high-end outdoor equipment enthusiasts.
Intended Use: Tactical/Sub
Type of Manufacture: industrial
Blade: made of Beta Titanium with a micropeened finish
Country of manufacture USA
Handle: Hytrel
Blade length: 185mm.
Blade thickness: 6.3mm.
Total length: 305mm.
Weight: 264g.
Sheath: made of Hytrel and rubber, with Nylon strap
Packaging: /
Notes: previously purchased knife, from private collection - discontinued, iconic early 2000s productMPK12-TI-CP€0.00Only 0 leftOnly 0 leftOut of stock -
Mission - MPK10-A2 Plain Edge - Navy Seal Knife - USED - Knife
Knife withdrawn from private collection - Used, but overall in good condition - An iconic, iconic knife from the first decade of the 2000s, tested and selected by the U.S. Navy Seals - The knife already when new presented itself with an average low level of finish and with a rough micropeened blade already very delicate and marked, this knife, used in the field by an Italian soldier in theaters of war, shows signs of cosmetic wear on both blade and sheath that do not affect its functionality in the slightest - Factory sharpening still in excellent condition - Original amphibious scabbard, in very good condition - No box - Checked and certified by our in-house laboratory.
Intended Use: Tactical / MultiroleType of Manufacture: industrial
Blade: A2 steel hardened to 57/58HRC
Country of Production: USA
Handle: made of Hytrel
Blade length: 140mm.
Blade thickness: 6.3mm.
Total length: 267mm.
Weight: 360g.
Sheath: amphibious, made of Hytrel
Packaging: without original packaging
Notes: used knife, withdrawn from private collection, overall in good conditionMI-MPK10-A2€0.00Only 0 leftOnly 0 leftOut of stock -
Sog - Pillar - CPM-S35VN - UF1001 - knife
Destination of use: sports / tactical
Type of production: industrial
Country of production: USA
Blade: full tang, stainless steel CPM-S35VN, 61HRC
Blade treatment: two tone: satin & stonewashed
Handle: black canvas micarta
Blade length: 127mm.
Blade thickness: 4mm.
Total length: 251mm.
Balancing: on the guard branch
Weight: 206g.
Sheath: in kydex, multiposition, with Tek-Lok type connection
Packaging: cardboard box with Sog Knives logos
Note: -S-UF1001€209.02Only 0 leftOnly 0 left
Out of stock -
Mission - MPK10-Ti Half Serrated - Coltello
Destinazione d'uso: Tattico/Sub
Tipo di Produzione: industriale
Lama: in Titanio Beta con finitura micropallinata
Produzione Lama USA
Manicatura: Hytrel
Lunghezza lama: 140mm.
Spessore della lama: 6.3mm.
Lunghezza totale: 267mm.
Bilanciatura: -
Peso: 240g.
Chiusura: -
Clip: -
Fodero: in Hytrel
Confezione: scatola di cartone con loghi Mission
Note: -10857€409.02Only 0 leftOnly 0 leftOut of stock
Sports, Outdoor, Tactical, and Collectible Knives: The Collini Selection
For over 50 years, Coltelleria Collini has been a reference point in Italy for the world of specialized cutlery. Since 1968, we have been selecting sports, outdoor, professional, and collectible knives, collaborating exclusively with official brands, historical manufacturers, and master artisans.
In this category, you will find thousands of original knives, chosen for demanding collectors, EDC, outdoor, and bushcraft enthusiasts, as well as professional operators who require reliability, quality materials, and consistent performance over time.
Military & Tactical Knives
Knives designed for heavy-duty and professional use, where robustness and reliability are paramount. We select world-leading brands such as Extrema Ratio, Zero Tolerance, Ka-Bar, and Cold Steel. Fixed and folding blades developed to withstand extreme conditions.
Sports & Outdoor Knives
From trekking to hiking, from bushcraft to everyday carry (EDC). Discover the Italian excellence of Fox Knives and LionSteel, the Nordic solidity of Fallkniven, and great classics like Opinel and Spyderco.
Collectible & Rare Knives
Custom, vintage, limited edition, and discontinued knives. Through our Approved program, we acquire, evaluate, and certify private collections, offering our customers access to rare, display, and investment-grade blades.
Why choose Coltelleria Collini since 1968
We are not just an e-commerce site, but a historic cutlery shop with direct experience on the products we offer. Buying from us guarantees:
- Certified Originality: we are official dealers for all brands we carry.
- Real Stock with fast shipping.
- Qualified Assistance and technical advice before and after sales.
Knives FAQ
There is no absolute "best" brand, but specific leaders for each use. For tactical and professional use, Extrema Ratio and Zero Tolerance are top tier. For outdoor and EDC, Fox, LionSteel, Fallkniven, and Spyderco excel.
Yes, buying sports and collectible knives online is generally legal for adults. However, laws regarding carrying and transporting knives in public vary significantly by country. Always check your local regulations.