The Maxim Defense PDX is an ultra-compact pistol using a 5.5-inch barrel with the Maxim SCW (Super Compact Weapon) stock, achieving one of the smallest 5.56mm pistol-classified firearms on the market. Type: Pistol Action: Gas-Operated Caliber: 5.56x45mm Capacity: 30 Year introduced: 2019, USA Weight: 5.6 oz Overall length: 19.5" Status: Active Intended use: PDW, Tactical, Vehicle Defense