The Smith & Wesson M&P15 Sport III 5.56 NATO rifle is a gas-operated AR-pattern rifle with a 16-inch barrel and a 15-inch free-floating M-LOK handguard (Smith & Wesson part no. 13807). It pairs a mid-length gas system with a 1:8 twist 5R-rifled barrel, so it handles a wide range of bullet weights with less felt recoil than a shorter system. The rifle ships with no iron sights and a full-length Picatinny-style top rail, which leaves the choice of optic to you. A 6-position adjustable stock and polymer grip round out the black rifle. It suits range, home-defense and general-purpose use for owners who want a capable carbine without a premium price.

Key Specifications

• Chambering is 5.56 NATO, a common cartridge with plentiful ammunition choices.
• The barrel is 16 inches of 4140 steel with an Armornite finish, a corrosion-resistant treatment.
• Rifling is a 1:8 twist with 5R profile, which keeps consistent contact with the projectile for accuracy.
• The gas system is mid-length, which gives less felt recoil than a carbine-length system.
• The handguard is a 15-inch free-floating M-LOK design that mounts accessories on every side.
• Capacity is 30+1 rounds, and the rifle ships with one 30-round magazine.
• The stock is a 6-position adjustable design, so length of pull can be set for different shooters and gear.
• The receivers are 7075-T6 aluminum, a strong, lightweight aerospace alloy.
• The muzzle is threaded and fitted with an A2 flash suppressor, which can be swapped for another device.
• The top is a full-length Picatinny-style rail with no iron sights, ready for the optic of your choice.

Frequently Asked Questions

Does it come with sights? No. The rifle ships with no iron sights and a full-length Picatinny-style top rail, so you add a red dot, scope or backup sights of your choice.

What caliber does it use? Smith & Wesson lists the caliber as 5.56 NATO/.223 Rem. It ships with one 30-round magazine and holds 30+1 rounds.

How long is it? S&W lists the overall length as 32 inches with the stock collapsed and 35 inches extended, and the rifle weighs 6.52 pounds.

Buy the Smith & Wesson M&P15 Sport III 5.56 NATO Rifle, 16-Inch Barrel, 15-Inch M-LOK, 30-Round

The Sport III gives you a free-float M-LOK handguard, a mid-length gas system and a forged integral trigger guard in a rifle built to be accessorized. Order it from our Lubbock, Texas gun shop for fast, insured shipping to your FFL, and see more AR rifles from Smith & Wesson.