The M&P15 Slim Line is a lightweight-optimized AR-15 featuring an M-LOK free-float handguard with minimal wall thickness, slim profile pistol grip, and 16-inch lightweight barrel contour. The reduced-diameter components minimize overall weight while maintaining the M&P15 platform's reliability. Targets the hunting and carry market where weight is a primary concern. Type: Rifle Action: Semi-Automatic Caliber: 5.56 NATO Capacity: 30 Year introduced: 2017, USA Weight: 5.4 oz Overall length: 35" Status: Discontinued Intended use: Hunting, Sport Shooting