Everything you need to complete the build of a high-performance AR-15 lower receiver. Key parts have been coated with NiB-X® (WMD’s exclusive nickel boron coating process), which minimizes friction & wear and greatly reduces the need for lubrication and cleaning). WMD recommends that these components be installed by a qualified gunsmith. Parts included in this kit: Bolt Catch, Bolt Catch Plunger, Buffer Retainer, Disconnect*, Magazine Catch, Magazine Release Button, Trigger Guard Assembly, Safety Selector, Selector Detent, Lock Washer, Pistol Grip Screw, Hammer*, and Trigger*.

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