January 13, 2010: China has developed a new PDW (Personal Defense Weapon, or pistol replacement) using a 4.6x30mm round. The new weapon is a variant of the Type 79 PFW (which uses the old Russian 7.62x25mm round), weighs 1.6 kg (3.6 pounds) and has a 30 round, dual stack, magazine. Rate of fire is single, 400 or 600 rounds per minute. It has a Picatinny rail on top for scopes and sights. With the telescopic stock closed, the weapon is 34cm (13.4 inches) long, and 54cm (21.2 inches) with the stock extended. The weapon is gas operated with a closed bolt.
The bullets are about half the weight of 5.56mm ones, and the 4.6mm round is lethal at short ranges, especially in bursts. The bullet travels at high speed (over 700 meters a second). The 4.6mm round will not penetrate walls or ceilings as well as 9mm or 5.56mm bullets, meaning less chance of unintended casualties.