Customize your AR-style receiver to meet your preferences with the Magpul AR ESK Selector. This kit is made of chromoly steel with a corrosion-resistant finish for lasting durability and comes with three polymer levers. The reversible selector axle offers two different throw options, and the three levers are easy to mount. If you want to reconfigure the receiver, simply remove the grip and use a hex key to pop out the selector pin. Magpul AR ESK Selector Black - Shooting Supplies And Accessories at Academy Sports