A Personal Defense Weapon (PDW) is a compact, lightweight firearm designed to bridge the gap between a submachine gun and a carbine. Typically chambered in intermediate or specialized cartridges, it offers better armor penetration than traditional pistol-caliber submachine guns while maintaining a smaller and more manageable size than standard rifles. PDWs are often intended for use by support troops, vehicle crews, and special forces who need a compact and effective weapon for self-defense or close-quarters combat situations. They often feature selective fire capabilities and are designed for ease of use and maneuverability in confined spaces.