The Walther BUK Back Up Knife has a 4-inch black finish 440C stainless drop point blade at 8.38 inches overall, a black synthetic handle, a lanyard hole and a black Kydex belt sheath.
Back Up is the intent behind the name: a second fixed blade carried alongside a primary knife or sidearm, sized to ride flat without adding noticeable bulk. 440C was the benchmark stainless in production knives for decades, with high chromium for corrosion resistance and enough carbon to take a fine edge that comes back without diamond abrasives.
The drop point sits the tip below the spine line for control, with a long belly behind it for slicing. Kydex holds the blade with a positive snap rather than friction, so the knife stays put when inverted or knocked. Explore more Tactical Fixed Blade Knives.
- Built as a second blade alongside a primary knife
- 440C resharpens without diamond abrasives
- 4-inch drop point, 8.38 inches overall
- Kydex sheath holds the blade when inverted
