The Maxim Defense PDX is an ultra-compact 5.56x45mm AR-pistol platform with a 5.5-inch barrel, built around Maxim's SCW (Super Compact Weapon) buffer system that eliminates the traditional carbine buffer tube and allows the pistol to be significantly shorter than standard AR pistols. The PDX accepts standard AR-15 magazines and compatible upper components. The Maxim SCW stock can be added for SBR configuration. Type: Semi-Auto Pistol Action: Semi-Automatic Caliber: 5.56x45mm Capacity: 30 Year introduced: 2018, USA Weight: 60 oz Overall length: 20" Status: Active Intended use: home_defense, duty, special_operations