The Smith & Wesson M&P 15 Sport II is a budget-tier AR-15 that added a forward assist to the popular Sport I model. It uses a 16-inch M4-profile barrel, A2 front sight, and a fixed A2-style stock. The Sport II became one of the best-selling AR-15s in history due to its price-to-quality ratio. Type: Semi-Auto Rifle Action: Direct Impingement Caliber: 5.56x45mm Capacity: 30 Year introduced: 2015, USA Weight: 6.45 oz Overall length: 32" Status: Active Intended use: Home Defense, Range, Training