Smith & Wesson M&P 15, Sport III, Compliant Version, Semi-automatic Rifle, AR, 223 Remington/556NATO, 16 Heavy Barrel, Matte Finish, Black, Fixed Stock, 15 Free-floating M-LOK Handguard, 10 Rounds, 1 Magazine 13953 Built to perform under various conditions, the M&P SPORT III rifle is as versatile as it is reliable. Engineered for a wide variety of recreation, sport shooting, and professional applications. The SPORT III offers more options to accessorize than the previous generation. Lightweight and rugged, the SPORT III embodies the best combination of function and form.