S&W M&P15 Sport III | 5.56 NATO | 16″ | 10rd | 13955

The Smith & Wesson M&P15 Sport III is a California-compliant modern sporting rifle chambered for 5.56 NATO with a 16″ barrel and a 15″ free-floating M-LOK handguard. It uses a mid-length gas system, 1:8″ 5R rifling and a 7075-T6 aluminum receiver. For an optic under $1,000 that pairs well with this platform, consider the Vortex Strike Eagle 1-6×24 for close-to-mid range shooting on an AR build.

This rifle is suited to recreational range shooting and professional training applications where a CA-compliant configuration is required. Its free-floating handguard and full-length Picatinny top rail make it straightforward to mount backup irons and a low-power variable optic.

Product Specifications

• The manufacturer and model is Smith & Wesson M&P15 Sport III (MFG# 13955).
• The caliber is listed as .223 Rem / 5.56 NATO.
• The barrel measures 16 inches and is fitted with an A2 compensator.
• The barrel material is 4140 steel with Armornite finish.
• The rifling is 1:8″ 5R rifling.
• The handguard is a 15″ free-floating M-LOK unit.
• The gas system is a mid-length gas system.
• The receiver is 7075-T6 aluminum.
• The action is gas-operated semi-auto.
• The stock is a 6-position adjustable stock.
• The top rail is a full-length Picatinny-style rail.
• The overall length is 35 inches (extended/collapsed details in manufacturer specs).
• The listed capacity is 10 rounds.
• The finish/color is black / anodized.
• UPC: 022188896763

Lightweight and configured to meet California requirements, the M&P15 Sport III offers a familiar AR ergonomics package with modern features like a free-floating M-LOK handguard and mid-length gas system. The full-length Picatinny rail simplifies mounting optics and accessories, and the 1:8″ 5R rifling provides flexibility across a range of common bullets.

Owners commonly remark that the rifle is reliable and versatile, reflecting comments found in product literature and user feedback.

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