Leapers, Inc. - UTG Model 4, Combat Ops S2, Stock, Ambidextrous Sling Loop and Reversible QD Sling Swivel Housing, Polymer Stock Only, Black Finish RBUS2BMS The Leapers UTG AR-15 PRO Model 4 Ops Ready S2 Stock is molded from high impact reinforced polymer materials. It features an ergonomically chamfered rubberized butt pad and a slanted cheek rest that enhances shooting stability and consistent firearm control. The Mil-Spec stock has an integral sling loop and ambidextrous QD sling swivel housing. Lightweight and super slim" the stock has fully dehorned corners and melted contours for snag-free use.