The Smith & Wesson M&P15 Sport III in 5.56 NATO is a 16-inch, 10-round version of the company’s M&P Sport rifle (brand part no. 13952). Smith & Wesson updated the Sport III with a full-length free-float M-LOK handguard, a mid-length gas system and a 1:8 twist barrel that handles a wider range of bullet weights. The lighter barrel profile and reduced gas to the shooter’s face make it comfortable to shoot at the range. It suits shooters who need a reliable, upgradeable 5.56 rifle with a 10-round capacity.

Key Specifications

• Chambered in 5.56 NATO, a cartridge with deep ammunition availability.
• The barrel is 16 inches long with a lighter profile, which keeps the rifle balanced and quick to handle.
• The twist rate is 1:8, which supports a wider range of ammunition.
• The barrel has 5R rifling and an Armornite finish, which improves gas seal and extends barrel life.
• Capacity is 10 rounds, and one magazine is included.
• The gas system is mid-length, which reduces recoil and the gas that reaches the shooter’s face.
• The handguard is a full-length free-float M-LOK design, which gives plenty of room to add accessories.
• The receiver has a forward assist, dust cover and forged integral trigger guard, along with a chromed firing pin.
• The stock is adjustable, and the safety is a thumb safety on the receiver.
• The rifle ships with no sights installed on an optic-ready top rail, so you can mount the optic or irons you prefer.

Frequently Asked Questions

Is the Sport III ready for an optic? Yes. Smith & Wesson lists this rifle as optic ready with no sights installed, so you choose the optic or sights that suit you.

What is the twist rate? The barrel has a 1:8 twist with 5R rifling, which supports a wide range of 5.56 bullet weights.

How many rounds does it hold? This version holds 10 rounds in the included magazine.

Buy the Smith & Wesson M&P15 Sport III 5.56 NATO Rifle, 10-Round

The Sport III keeps the AR-15 basics sound and leaves room to build on them. Order it from our Lubbock, Texas gun shop for fast, insured shipping to your FFL, and browse more AR-pattern rifles while you are here.