Click to enlargeEXTREMA RATIO S.E.R.E. 2 GOI

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The Extrema Ratio SERE 2 GOI* is a redesigned SERE with input from Italian Navy Seals. In addition, the SERE was developed with major input from survival specialists and martial arts experts. This makes the SERE 2 GOI an especially well-designed survival, self-defense weapon for you. Versatile and tough.


The SERE 2 GOI blade has triangular planes converging to create a robust spear point. There is a slot in the blade that you can use as a screw pin shackle wrench. The blade has a serrated area on the spine. A lower section near the sharpened blade has a halyard-cutter with interchangeable blades. (Included).


The Extrema Ratio SERE 2 GOI handle fits between your index and your middle finger with indentations on the rest of the handle (both sides) for your other fingers. This gives you a very powerful grip. Handle is textured to insure your grip is secure even if your hands are wet or you are wearing gloves. There is a substantial window breaker on the end. There are two lanyard holes in the handle. The handle is slightly angled so it fits comfortably in your hand in a natural position.


Made of Kydex. Has an automatic retention to hold your knife in place. Includes a removable lock for either right or left side. There are multiple lanyard holes around the outer edge. An Extrema Ratio belt clip that is adjustable for different angles is attached to the back. An extension provides a flat-blade screwdriver on the end.

Total Length of Knife: mm 219.20 (8.63 inches)

Blade Length (From Tip to Handle): mm 148.08 ( 5.83 inches)

Weight of Knife: g 309.00 (10.90 ounces)

Weight of Knife and Sheath: g 447.92 (15.80 ounces)

Blade Thickness (Widest Part): mm 6.3 (0.25 inches)

Blade Width (Widest Section): mm 52.07 (2.05 inches)

Handle Length (Textured Section): mm 102.11 (4.02 inches)

Blade Steel: Bohler N690 cobalt stainless steel**

Blade Hardness: Rockwell 58 HRC

Main Grind: Flat

Serrations: Partially serrated blade

Handle: Forprene***

Sheath Material: Kydex****

Sheath Belt Clip: Yes


* The GOI (Gruppo Operativo Incursori) is an Italian Special Forces group. Highly trained for naval and land operations. They are equipped with special weapons.

** The blade is made with N690 cobalt stainless steel, a high performance steel with excellent cutting and mechanical characteristics. This steel is also used in the butchering industry and for making surgical instruments.

*** Forprene (NATO Mil-Spec elastomer) has extreme temperature and moisture resistance.

**** Kydex is a durable thermoplastic that is tough, water proof, and chemical resistant.

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