Adams Arms P1 Upper 5.56 NATO / .223 Rem 16″ Barrel The Adams Arms P1 is a lightweight and highly durable complete upper assembly for an AR-style rifle build. It comes chambered in 5.56 NATO with a 16 inch barrel. Features include an optics ready flat-top, a heatshield handguard, and a forward assist. Get this upper today for the best price online from us!

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