Extrema Ratio · Code 04.1000.0484/M3/BLK/BLK

Fixed Blade Knife Extrema Ratio VIPERA TOTAL BLACK 04.1000.0484/M3/BLK/BLK

★★★★★ 4,8 147 reviews Heureka verified
Extrema Ratio Vipera Black Forprene is a compact, extremely durable knife that delivers top-tier performance in every situation. It combines modern materials, precise workmanship, and tactical functionality into one lightweight and reliable tool. It is a knife you can rely on — anytime, anywhere. Free shipping.
Knives Fixed knives

Detailed product description

Compact power, maximum control — ready for any situation.

Extrema Ratio Vipera Black Forprene, Black is a compact tactical knife designed for professionals operating in demanding conditions — in the field, during interventions, and in rescue operations.

The design of this model is based on agility and operational efficiency. These qualities are reflected in the ergonomics of the handle and the precisely engineered blade geometry. Here, the Italian brand Extrema Ratio combines its signature military style with maximum functionality and reliability.

At the heart of the knife is a blade made from premium Böhler M390 powder steel, offering extreme wear resistance, high hardness, and long-lasting edge retention. The black BURNISHED MIL-C-13924 finish increases durability, eliminates glare, and gives the knife its tactical character.

Vipera is a tool designed for dynamic and controlled use — from precise cuts to demanding tactical operations.

Full Tang construction

ASPIS nylon sheath, MOLLE compatible

Key parameters

Overall length cca 9.29" (23,6 cm)
Blade length cca 4.57" (11,6 cm)
Weight cca 3.32 oz (~ 94 g)
Steel Böhler M390 - prášková steel
Steel hardness cca 61 HRC
Handle Forprene (black)
Blade thickness cca 0.16" (4 mm)
Blade finish MIL-C-13924 Burnished
Blade shape Drop-point
Grind Flat Ground (plochý)
Production Italy

About Extrema Ratio

Extrema Ratio is a renowned Italian brand specializing in the production of tactical knives for the military, security forces, and professional users.

Their knives are tested in real conditions and place emphasis on durability, ergonomics, and uncompromising functionality.

Character and philosophy

Vipera Black is intended for users who demand a compact knife without compromises in performance.

The drop-point blade with a flat grind offers an ideal combination of control and versatility. The knife is optimized for precise work as well as intensive field use.

The ergonomic handle minimizes hand fatigue and enables secure handling even during prolonged use. Every detail is designed for maximum control and efficiency.

Key benefits

  • Premium Böhler M390 steel – extreme edge retention and durability
  • Compact and lightweight construction – ideal for rapid deployment
  • Full tang construction – maximum strength
  • Non-slip Forprene handle – secure grip in all conditions
  • Tactical finish – no glare and increased durability
  • Professional sheath with MOLLE system

Possible limitations

  • Hard M390 steel requires quality sharpening tools
  • The compact size is not ideal for heavy-duty tasks
  • Premium materials mean a higher purchase price

Maintenance and care

  • Clean and dry the blade after use
  • Check the edge regularly
  • Avoid prolonged exposure to moisture
  • Keep the sheath dry and clean
  • Store in a dry environment

To maintain the maximum sharpness of the Böhler M390 steel blade, it is recommended to use quality sharpening systems intended for hard powder steels.

With proper sharpening, the blade will retain extreme sharpness and a long service life.

🛒 Available on our Moskito website.

Final verdict

Extrema Ratio Vipera Black Forprene is a compact, extremely durable knife that delivers top-tier performance in every situation.

It combines modern materials, precise workmanship, and tactical functionality into one lightweight and reliable tool. It is a knife you can rely on — anytime, anywhere.

Vipera – speed, precision, and control in every cut. 🔥

Customer reviews

All 147 reviews →
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147 reviews · Heureka verified
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