Smith & Wesson M&P15 Sport III 5.56 NATO 16" - AR-15 Rifle

A solid 5.56 NATO AR-15 without the fluff: the Smith & Wesson M&P15 Sport III 5.56 NATO 16" focuses on reliable function, practical configuration, and durable construction in a package ready to use straight from the box.

A semi-automatic AR-15 rifle chambered in 5.56 NATO, the Smith & Wesson M&P15 Sport III 5.56 NATO 16" combines mid-length direct impingement operation with standard AR-15 architecture for straightforward reliability.

Proven Gas System: Running a mid-length direct impingement system that has proven itself across millions of rounds in the field, this 5.56 NATO platform brings that reliability record to every range session and defensive use case.

Well-Balanced Profile: The 16" barrel and 15" M-LOK free-float handguard combination keep this rifle handy without sacrificing the sight radius and velocity that make the 5.56 NATO cartridge effective.

AR-15 Ecosystem Access: Standard AR-15 compatibility means accessories, replacement parts, and upgrade components are universally available — this rifle will never be an orphan platform.

Low-Maintenance Reliability: A quality finish and properly spec'd components reduce maintenance requirements without cutting corners on durability — more time shooting, less time cleaning.

• Caliber: 5.56 NATO
• Barrel Length: 16"
• Gas System: Mid-Length Direct Impingement
• Handguard: 15" M-Lok Free-Float
• Muzzle Threading: 1/2x28
• Magazine Capacity: 10 Round
• Finish: Type III Hardcoat Anodized
• Origin: Made in the USA

Works with standard AR-15 lower receivers and accepts STANAG 5.56 NATO magazines. Designed for mil-spec carbine buffer systems and compatible with the full ecosystem of AR-15 parts and accessories.

The upper and lower receivers are constructed from 7075 aluminum with a Type III Hardcoat Anodized finish — a durable combination that resists corrosion and maintains tight tolerances over an extended service life.

A practical choice for 3-gun competition, recreational plinking, home defense, and general-purpose utility. Works equally well as a first AR-15 or as a quality addition to an existing collection.

Smith and Wesson has been producing American firearms for over 170 years. The M&P15 series is backed by S&W's lifetime service policy and a track record of reliable performance in the field. Made in the USA.