Leapers, Inc. - UTG Model 4, Combat Ops S3, Stock Kit, 6-Position Mil-Spec Stock Assembly, includes Extension Tube, Buffer, Buffer Spring, Tear-drop Ring and Castle Nut, Black Finish RBUS3BM The Leapers UTG AR-15 PRO Model 4 Ops Ready S3 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 stock has an integral ambidextrous sling loop and ambidextrous QD sling swivel housing for left or right handed shooters. The stock has fully dehorned corners and melted contours for snag-free use. This kit includes a polymer stock" mil-spec 6-position extension tube" buffer" buffer spring" tear-drop ring and castle nut.