Extrema Ratio Ultramarine Fixed Blade Knife 5.63" Black Bohler N690
Extrema Ratio Ultramarine Fixed Blade Knife 5.63" Black Bohler N690
Extrema Ratio Ultramarine Fixed Blade Knife 5.63" Black Bohler N690
Extrema Ratio Ultramarine Fixed Blade Knife 5.63" Black Bohler N690
  1. Extrema Ratio Ultramarine Fixed Blade Knife 5.63" Black Bohler N690
  2. Extrema Ratio Ultramarine Fixed Blade Knife 5.63" Black Bohler N690
  3. Extrema Ratio Ultramarine Fixed Blade Knife 5.63" Black Bohler N690
  4. Extrema Ratio Ultramarine Fixed Blade Knife 5.63" Black Bohler N690

Extrema Ratio Ultramarine Fixed Blade Knife 5.63″ Black Bohler N690

$691.00 — taxes calculated at checkout

Characteristics

Blade Length5.63"
Overall Length11.63"
ColorBlack
Blade MaterialBohler N690 stainless
Blade Finishmatte finish
Handle Materialpolymer
Package TypeHardside carrying case.

Available

SKU: EX320 Categories: , Brand:
Extrema Ratio Ultramarine Fixed Blade N690 Tactical Knife
Extrema Ratio Ultramarine Fixed Blade Knife 5.63" Black Bohler N690

Italian-made fixed blade with modular design—detach the blade to mount on poles or spears for specialized tactical work.

  • Blade: 5.63" Bohler N690 stainless, black matte finish with partially serrated top edge and line cutter
  • Overall Length: 11.63" (14.25" with sheath); weighs 4.05 lbs
  • Handle: Black polymer, fully disassembled design for modular mounting
  • Skull Crusher Pommel: Heavy-duty striking capability built into the base
  • Carry System: Black ABS/nylon belt sheath with arm and leg straps, includes Tek-Lok attachment, hardside case included
  • Made in Italy by Extrema Ratio, trusted by military and tactical professionals

Perfect for tactical operators, wilderness professionals, or serious collectors who value versatile deployment options and rugged Italian engineering.

Product SKU: EX320

Product Brand: Extrema Ratio

Product Price: 556.75

Price Valid Until:

The Ultramarine is a 11.63-inch fixed blade built around a 5.63-inch black matte Bohler N690 stainless blade with a partially serrated top edge featuring a dedicated line cutter. The black polymer handle features a skull crusher pommel and disassembles to allow the blade to be mounted on a pole or spear shaft. The knife ships with a black ABS and nylon belt sheath equipped with arm and leg straps, plus a Tek-Lok attachment point, along with a hardside carrying case for transport and storage.

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