Extrema Ratio BFK Series Fixed Blade Knives

Explore the fixed-blade side of the Extrema Ratio BFK Series: Pixel, Micro and Nano. Three carefully measured sizes bring the reliability and straightforward function of a fixed blade into everyday carry—from the full-size Pixel to the exceptionally discreet Nano.

Black and Tactical Mud models pair machined aluminum handles with MagnaCut steel for the series’ most demanding applications. Green carbon fiber, Avio G10 and Tobacco Micarta versions use Extrema Ratio’s Nitrogen steel specification, selected for corrosion resistance, a regular edge and practical resharpening.

Every BFK Series fixed blade includes a black Kydex sheath with a double Malice clip and paracord for adaptable belt, neck or gear attachment. Choose the size, steel and handle configuration that fits how you carry.

Sort by

Extrema Ratio BFK Pixel Tobacco Brown Micarta Nitrogen Steel Fixed Blade Knife 0253NSM2

Extrema Ratio BFK Pixel Tactical Mud Aluminum MagnaCut Steel Fixed Blade Knife 0253MBA3

Extrema Ratio BFK Micro Green Carbon Fiber Nitrogen Steel Fixed Blade Knife 0252NBF2

Extrema Ratio BFK Micro Avio Blue-Gray G10 Nitrogen Steel Fixed Blade Knife 0252NSM3

Extrema Ratio BFK Micro Black Aluminum MagnaCut Steel Fixed Blade Knife 0252MBA1

Extrema Ratio BFK Nano Tobacco Brown Micarta Nitrogen Steel Fixed Blade Knife 0251NSM2

Extrema Ratio BFK Nano Tactical Mud Aluminum MagnaCut Steel Fixed Blade Knife 0251MBA3

Extrema Ratio BFK Pixel Green Carbon Fiber Nitrogen Steel Fixed Blade Knife 0253NSF2

Extrema Ratio BFK Pixel Black Aluminum MagnaCut Steel Fixed Blade Knife 0253MBA1

Extrema Ratio BFK Pixel Avio Blue-Gray G10 Nitrogen Steel Fixed Blade Knife 0253NSM3

Extrema Ratio BFK Micro Tactical Mud Aluminum MagnaCut Steel Fixed Blade Knife 0252MBA3

Extrema Ratio BFK Micro Tobacco Brown Micarta Nitrogen Steel Fixed Blade Knife 0252NSM2

Extrema Ratio BFK Nano Avio Blue-Gray G10 Nitrogen Steel Fixed Blade Knife 0251NSM3

Extrema Ratio BFK Nano Green Carbon Fiber Nitrogen Steel Fixed Blade Knife 0251NSF2

Extrema Ratio BFK Nano Black Aluminum MagnaCut Steel Fixed Blade Knife 0251MBA1