The Extrema Ratio RAO Black is a compact tactical knife developed in 2006 for Italy’s 185th RAO Regiment “Folgore.” Combining folding convenience with the strength of a fixed blade, its guillotine‑style liner lock features a threaded steel pivot for absolute lock‑up. Opening and closing require two‑hand operation on the lock tabs, minimizing self‑injury risk from the blade’s mass.

Technical specifications & package contents

Knife weight: 335 g (11.8 oz)

Blade length: 119 mm (4.7 in)

Overall length: 263 mm (10.4 in)

Blade thickness: 6 mm (0.24 in)

Blade steel: Böhler N690, 58 HRC

Blade finish: MIL‑C‑13924 black oxide

Edge grind: flat

Handle: anodized anticorodal aluminum scales, ergonomic

Lock mechanism: guillotine‑style liner lock with threaded steel safety pivot

Sheath: durable fabric with integrated diamond sharpener pocket and double‑clip retention cord

Sheath mounting: MOLLE and hook‑and‑loop compatible for vests and belts

User benefits

Secure lock-up: threaded pivot prevents any blade slip

Two‑hand operation avoids accidental closures due to blade inertia

Heavy, sharp blade suitable for hard use and survival tasks

Multifunction sheath with built-in sharpener and open/closed carry options

Warnings and usage information (compliant with Italian GPSR regulations)

Keep out of reach of children: sharp blade and mechanical parts may cause serious injury.

Before use, verify the pivot screw is properly tightened to ensure stable lock.

Always operate open/close with both hands on the lock tabs.

Do not use as a pry bar or hammer to avoid damaging blade and mechanism.

Clean and thoroughly dry blade and sheath after exposure to moisture or dirt; avoid harsh solvents.

Store in a dry, ventilated place with blade locked closed.

Replace the pivot screw or contact an authorized service center if wear or damage occurs.