B&T MP9 — compact select-fire PDW derived from the Steyr TMP. Ambidextrous, polymer-framed with folding foregrip; used by Swiss Army and law enforcement. Civilian semi-auto version sold as the TP9. Type: Submachine Gun Action: Select-Fire Caliber: 9mm Luger Capacity: 25 Year introduced: 2009, Switzerland Weight: 88 oz Overall length: 17.5" Status: Active Intended use: military, law_enforcement