Military knives have historically served more as versatile tools for fieldwork and daily tasks than as weapons. Purpose-designed service knives issued through specific contracts or tenders have been rare, with notable exceptions like the M1880 Hunting and M1890 Entrenching Knives of the US Army, the rare Wehrmacht 45 combat and utility knife, and the British Army MOD Knife, still in use today. The HK MP7 Personal Duty Knife (PDK) continues this legacy, crafted for maximum versatility in tactical, outdoor, bushcraft, and hunting scenarios. Named after the HK MP7 submachine gun, which embodies the Personal Defence Weapon (PDW) concept, the PDK integrates ergonomic design, textured grip, exceptional durability, and reliability akin to its namesake firearm.