The American Tactical / ATI AR-15 Mil-Sport RIA P3P is a purpose-built semi-automatic platform chambered in 5.56 NATO with a 16″ manganese-phosphated barrel. It pairs a forged aluminum receiver set with an Alpha stock and a compact M-LOK fore-end to support a range of modern accessories. The configuration is appropriate for range use, training, and general-purpose sport shooting.
Key Specifications
- The caliber is 5.56 NATO.
- The barrel measures 16 inches and is manganese-phosphated.
- The barrel twist rate is 1:8.
- The receivers are forged aluminum.
- The forend is a 10-inch M-LOK handguard.
- The trigger/fire-control components are a Nano composite parts kit.
- The rifle is fitted with an Alpha Stock.
- The upper is a flat-top, optics-ready design.
- The finish and furniture are black.
Built with practical features and familiar AR ergonomics, this Mil-Sport configuration emphasizes modularity and straightforward function. The 10″ M-LOK handguard supports modern accessory layouts, while the forged receiver set and manganese-phosphated barrel provide a durable foundation for regular use at the range or in training environments. The package-level parts kit and Alpha stock make it a solid option for shooters who value a no-nonsense, serviceable rifle platform.
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