Introducing the Magpul ESK (enhanced selector kit) - AR, a versatile and ambidextrous selector kit designed for AR pattern firearms, offering customizable selectors with modern ergonomics at an affordable price point. The selector axle features a reversible design for either 60 or 90 degree throw options, crafted from fully-machined, heat-treated chromoly steel with a QPQ finish for exceptional durability against wear and corrosion. Included in the ESK - AR are three heavy-duty polymer levers - full-length, short and hybrid - allowing for flexible mounting on either side of the axle without any play. Selector pins in black and red serve as non-load bearing secondary lever locks and position indicators, offering user customization. Installation is straightforward once the grip is removed and reconfiguring levers is effortless with a small punch or hex key to remove the selector pin. The kit also features a corrosion-resistant detent with a low-friction coating, ensuring smooth and positive selector function. Designed specifically for Mil-Spec AR-pattern lower receivers, not compatible with select fire receivers.