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A two-piece, drop-in, anodized aluminum handguard that secures to the rifle via a mil-spec delta ring and accommodates the use of an A2-style gas block/front sight, the Triangle M-Lok Handguard–Mid-Length from NcStar provides shooters with a multitude of accessory mounting options. In addition to a receiver-height, 20-slot segment of Picatinny rail running along its top surface, the triangular handguard’s 2-, 6- and 10-o’clock faces all feature M-Lok-compatible slots, and the unit ships with one five-slot and one nine-slot rail section. The handguard is also available sized for use with carbine-length gas systems. Price: $55. ncstar.com.