The Magpul ESK (Enhanced Selector Kit) offers a variety of selector levers for the Magpul SL Grip Module & HK Polymer Trigger Housings. Keeping with the Magpul blueprint of innovation, the Magpul ESK results in a modular, ambidextrous selector with enhanced ergonomics. It provides a modern rendition of the classic MP5 SSL with updated aesthetics. With easier access to the user-configurable levers, the Magpul ESK allows quick firing hand activation and deactivation of the safety and provides for ambidextrous use. Constructed of our high-strength polymer and corrosion-resistant steel, these components are built with the proven reliability Magpul is known for. FeaturesUser-configurable levers for ambidextrous use Compatible with three-position SEF/SAFE-SEMI trigger packs Easier firing hand access to selector leversConstructed of high-strength polymer and corrosion-resistant steel componentsExceeds usability and performance of HK pattern SSL/ESSL