Smith & Wesson S&W M&P15 Sptiii 13952 556 16 10R Mlok Blk

The Smith & Wesson M&P15 Sport III is a 5.56 NATO rifle built for shooters who want a modern, adaptable platform without compromise. Whether you're heading to the range for tactical practice, running a carbine course, or working up loads for hunting, this gas-operated rifle balances reliability, accuracy, and shootability in a package that won't wear you down over a long day. The 16-inch barrel and mid-length gas system keep things nimble while managing recoil better than short-stroke alternatives, and the free-floating handguard lets you build the rifle your way.

The M&P15 Sport III ships with a 10-round magazine and comes optics-ready—mount your favorite red dot, scope, or magnified optic on the flat-top receiver and get after it. The 5R rifled barrel (1:8 twist) is forged 4140 chromoly with a threaded muzzle, meaning you can attach a suppressor, muzzle brake, or flash hider to tune recoil and noise. The adjustable stock lets you dial in your length of pull, and the free-floating handguard with M-LOK slots gives you room to mount lights, grips, and other furniture without the handguard touching the barrel—which means better inherent accuracy out of the box.

Fit and finish include an Armornite-finished barrel for corrosion resistance, a chromed firing pin for reliability, and a forged integral trigger guard. The rifle sports a polymer grip and thumb safety. Colorado, Hawaii, Rhode Island, and Vermont compliant. This is a purpose-built sport rifle from a maker with serious heritage in the defensive and tactical space—you're getting legitimate engineering, not a budget compromise.

Key Features

• Free-floating handguard with M-LOK slots for easy accessory mounting
• Mid-length gas system for reduced felt recoil and faster sight recovery
• 5R rifled barrel with 1:8 twist rate—shoots a wide range of ammunition accurately
• Threaded 16-inch barrel ready for suppressors or muzzle devices
• Forged integral trigger guard and chromed firing pin for durability
• Adjustable stock for custom length of pull
• Flat-top receiver—optics-ready with no iron sights included
• Armornite finish on barrel resists corrosion

Specifications

Caliber	5.56 NATO
Barrel Length	16 inches
Barrel Material	4140 chromoly steel
Rifling	5R, 1:8 twist
Action	Gas operated, direct impingement
Magazine Capacity	10 rounds (1 magazine included)
Stock	Adjustable
Handguard	Free-floating M-LOK
Safety	Thumb safety
Grip	Polymer
Receiver	Aluminum, flat-top optics-ready
Muzzle	Threaded
Finish	Black (Armornite barrel, standard finish frame)
Overall Length	35 inches
Overall Width	2.5 inches
Overall Height	8 inches
Weight	6.5 pounds (104.32 oz)
State Compliance	Colorado, Hawaii, Rhode Island, Vermont

Frequently Asked Questions

Can I mount a scope or red dot on the M&P15 Sport III?

Yes. The rifle features a flat-top receiver with Picatinny rail for optics mounting. No iron sights are included, so you'll need to add your own optic to use the rifle effectively.

Is the barrel threaded for suppressors or muzzle brakes?

Yes, the M&P15 Sport III comes with a threaded muzzle, so you can attach a suppressor, flash hider, muzzle brake, or other devices of standard 5.56 caliber thread pitch.

What accessories can I mount on the handguard?

The rifle features a free-floating M-LOK handguard, which accepts any standard M-LOK compatible rail, light, foregrip, or vertical grip. The free-floating design also improves inherent accuracy by preventing the handguard from contacting the barrel.

Is the M&P15 Sport III magazine compatible with standard AR-15 mags?

The rifle comes with one 10-round magazine. Standard 5.56 NATO AR-15 magazines should be mechanically compatible, though legality varies by state—check local laws before purchasing additional magazines.