The Smith & Wesson M&P15 is one of the most popular, reliable, and widely owned AR-15 style modern sporting rifles in the world. Introduced in 2006, the M&P (Military & Police) lineup ranges from the ultra-popular, budget-friendly M&P15 Sport II and newer Sport III to duty-ready tactical setups and competition-grade variants. It is widely praised as the quintessential entry-level rifle that offers duty-grade reliability right out of the box. VERY GOOD CONDITION NO BOX ONE 30-ROUND MAGAZINE Caliber: 5.56mm NATO / .223 Remington Capacity: 30+1 rounds (takes standard AR-15 PMAGs) Action: Gas-operated semi-automatic (Direct Impingement) Barrel Length: 16.0 inches (4140 steel, Armornite coated for corrosion resistance) Twist Rate: 1:9" (Sport II) or 1:8" (Sport III) - handles common 55gr to 62gr ammunition flawlessly Weight: ~6.5 lbs empty (highly agile and lightweight)