Extrema Ratio BFK Black N690 Tactical Mud folding knife
Extrema Ratio, located in Prato, Italy has been designing, manufacturing and selling high-quality combat knives since 1997. The company gained a great reputation for excellence that is unsurpassed in the military and tactical industry. The company prides itself in design, material and quality to deliver a high end product that meets the most severe standards. The first class handwork and well-selected material have contributed to form the image of the Extrema Ratio trademark all over the world.
Everyday Reliability in Earthy Tones
The Extrema Ratio BFK N690 Tactical Mud combines a practical everyday design with a solid locking mechanism and a warm, earthy handle colour. The full-size model in the BFK folding knife series, it measures 195.5 mm overall and weighs just 85.5 g, making it a capable companion for daily cutting tasks without unnecessary bulk.
The 82 mm flat-ground blade is crafted from Böhler N690 stainless steel, hardened to 58 HRC for a dependable balance of hardness and resilience. Its black burnished finish meets the MIL-C-13924 specification and contrasts with the muted Tactical Mud handle.
Machined handle scales in anodized Anticorodal aluminium provide a secure grip with dry or wet hands. The Crossbar Lock holds the blade securely open and can be operated with one hand from either side, allowing the fingers to remain clear of the cutting edge’s path when closing.
A reversible pocket clip offers convenient left- or right-side carry, keeping the BFK close at hand throughout the day.
Specifications
Blade material
N690
Blade style
Drop point
Blade grind
Full Flat
Blade hardness
HRC 58
Blade coating / finish
MIL-C-13924
Locking mechanism
Cross-bar Lock
Frame
Stainless steel
Opening mechanism
Hole
Handle
Anticorodal aluminum alloy
Weight:
3.598 oz
Overall length:
7.72″
Blade length:
3.23″
Length folded:
4.45″
Blade thickness:
0.11″
Country of origin:
Italy
Other features
Pocket clip
Emission offsetting
Greener use of materials
Sources from nature
Because it's simple yet important
Lamnia's speciality is a selection of more than 5,000 knives and folding knives. We carry hundreds of Scandinavian knives, the famous Finnish Puukko knives among them, folding knives, hunting knives and kitchen cutlery from the world's best brands, such as Spyderco, Cold Steel, Böker, Fox Cutlery and Benchmade.