DPMS Panther with a DIFS (Drop-In Free-Float System) handguard — a proprietary free-float design that retained the standard delta ring so the upper could be used without removing the gas tube. Offered improved accuracy of a free-float system with simpler installation than traditional free-float designs. Type: Rifle Action: Semi-Automatic Caliber: 5.56x45mm NATO Capacity: 30 Year introduced: 2006, United States Weight: 100 oz Overall length: 32.5" Status: Discontinued Intended use: Recreational Shooting, Home Defense, Law Enforcement