Whether a DIY gun enthusiast or a professional gunsmith, the Wheeler Pro Series Ultimate AR-15 Armorer's Kit gets you into the tool you need to fully encompass the tools needed for working on AR-15 rifles. This 28-piece kit features pro-grade tools to build, maintain, clean, customize, and even accurize AR rifles. Each tool is selected for its purpose-built features to add convenience to your modifications. Simply install springs and detents, properly torque muzzle devices and receiver extensions, and even lap your upper receiver to enhance accuracy on improperly cut uppers. The kit includes a latching hard case to protect your tools and keep them accessible on the move. 28-piece ultimate armorer's kit Use to build, maintain, clean, and customize AR-15 rifles Purpose built tools designed for use with ARs Includes hard case with latch for storage and use on the go