The Smith & Wesson M&P15 Sport III is an AR-pattern semi-automatic rifle chambered in 5.56x45mm with a 16-inch threaded barrel. It comes configured with an M-Lok handguard and includes a Crimson Trace red dot sight. The rifle feeds from a 30-round magazine. 
 

Key Specifications 

• Brand: Smith & Wesson 
• Model: M&P15 Sport III 
• Caliber: 5.56x45mm 
• Action: Semi Auto 
• Barrel Length: 16 in 
• Color/Finish: Black 
• Capacity: 30+1 
   

Detailed Features 

• 16-inch threaded barrel 
• M-Lok handguard 
• Crimson Trace CTS-106 red dot sight included 
• 30-round capacity 
• Gas-operated semi-automatic action

Owners of the M&P15 Sport III consistently note the value of getting a red dot sight bundled with the rifle. The Crimson Trace CTS-106 is considered a serviceable optic for the price point, and most buyers appreciate not having to source one separately.

The M-Lok handguard gets positive marks for its lightweight profile and accessory-mounting flexibility. The 16-inch threaded barrel is a popular feature among those who want the option to add a muzzle device. The trigger is adequate but splits opinion; some owners replace it as a first upgrade.

As a Sport-series rifle, the M&P15 Sport III is often described as a solid entry-level AR with reliable function. The common complaint is that the factory stock feels utilitarian, and the finish is basic. For shooters who want a ready-to-use AR without sourcing optics separately, it covers the essentials.