DPMS's M4-configuration Panther with a 16-inch M4-profile barrel, six-position collapsible stock, and flat-top upper. The AP4 was positioned as DPMS's duty-grade carbine for law enforcement and civilian tactical use at a price point well below Colt. Type: Rifle Action: Semi-Automatic Caliber: 5.56x45mm NATO Capacity: 30 Year introduced: 2002, United States Weight: 100.8 oz Overall length: 32.5" Status: Discontinued Intended use: Home Defense, Law Enforcement, Recreational Shooting