5.56 NATO is a widely used rifle cartridge developed for military and sporting applications, known for its reliability and versatility in AR-15 platforms. While not a manufacturer, many firearms companies produce 5.56 NATO specific parts, including barrels, upper receivers, bolt carrier groups, magazines, and complete rifles or build kits. These components are popular among shooters and builders seeking dependable, high performance solutions for tactical, sporting, and home defense use. If you need details on a specific manufacturer of 5.56 NATO parts, let me know!
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