The FN Self-Loading Police (SLP) MK I is a gas-operated 12 gauge semi-automatic shotgun with an extended magazine tube and tactical furniture, designed for law enforcement and home defense. Type: Shotgun Action: Semi-Automatic Caliber: 12 Gauge Capacity: 8 Year introduced: 2008, Belgium Weight: 128 oz Overall length: 39" Status: Active Intended use: Law Enforcement, Tactical, Home Defense