Product DescriptionThe UTG PRO AR-15 Ops Ready S4 Mil-Spec Stock Kit is a rugged, compact upgrade molded from impact-resistant, high-strength matte black polymer. Designed for heavy-duty use, the S4 profile offers a minimal footprint with ergonomic comfort, including a slanted cheek rest and rubberized butt pad. The kit arrives complete with a Mil-Spec extension tube, buffer, buffer spring, receiver end plate, and castle nut-everything needed to outfit your AR-15. Its unique 4.28-inch length and 4-position adjustability deliver a comfortable length of pull, especially when wearing a load-bearing vest or plate carrier, while ambidextrous sling mounting options enhance carry versatility.Product HighlightsCompact Ops Ready S4 stock with 4-position adjustability for a tailored length of pullImpact-resistant, high-strength polymer construction with matte black finishErgonomic slanted cheek rest and rubberized butt pad for improved comfortAmbidextrous quick-detach sling swivel housing plus standard sling loopComplete Mil-Spec kit: extension tube, buffer, buffer spring, receiver end plate, and castle nutSpecsColor: BlackMaterial: PolymerCompatibility: AR-15 riflesBuffer Tube Size: Mil-SpecAdjustability: 4-positionStock Length: 4.28 inchesStock Height: 5.20 inchesWeight: 15.5 ozIncluded Components: Ops Ready S4 stock, Mil-Spec extension tube, buffer, buffer spring, receiver end plate, castle nutCountry of Manufacture: USAUPC: 4717385552678Manufacturer Part Number: RBUS4BMBrand: Leapers, Inc. - UTGDisclaimer: We strive to provide accurate and up-to-date product descriptions, specifications, and images; however, errors or omissions may occasionally occur. We are not responsible for any inaccuracies or discrepancies in the content provided. If you notice anything incorrect or unclear, please contact us so we can correct it. When in doubt, we recommend verifying details directly with the product's manufacturer.