The SIG MPX K configured with the SIG folding brace adapter for use as an AR-pistol. Same 3-inch barrel and short-stroke gas piston as the standard MPX K. The brace adapter allows shouldering for more stable shooting. One of the most compact premium PCCs available in legal pistol configuration. Type: Pistol Action: Semi-Automatic Caliber: 9mm Capacity: 30 Year introduced: 2019, USA Weight: 61 oz Overall length: 14.5" Status: Active Intended use: Law Enforcement, Home Defense, Range