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Kit includes recoil buffer components for a new .223 AR15 Carbine build or to convert your current AR15 to use a Mil-Spec carbine buffer tube recoil system. - Kit includes: - Mil-Spec 6-Position/Carbine Tube - Material: 6061-T6 Aluminum - Finish: Hardcoat Anodized Black - .223 buffer spring - .223 buffer body - Latch Plate - Lock Ring