Product DescriptionThe UTG PRO AR-15 Ops Ready S4 Mil-Spec Stock Kit delivers a compact, duty-ready upgrade for AR-15 platforms. Molded from impact-resistant, high-strength polymer and paired with a Mil-Spec diameter extension tube, this kit is engineered for tight tolerance control and reliable performance. Its unique 4.28-inch length with 4-position adjustability offers a comfortable length of pull and effortless shouldering-especially when wearing load-bearing vests or plate carriers. Finished in Flat Dark Earth and proudly made in the USA, the kit comes complete with all essential components for a straightforward installation.Product HighlightsCompact Ops Ready S4 design with 4-position adjustability for optimized length of pullHigh-strength polymer stock and Mil-Spec aluminum extension tube engineered for durabilityFlat Dark Earth finish for a modern, low-profile aestheticComplete kit: extension tube, buffer, buffer spring, receiver end plate, and castle nutProudly made in the USA with tight tolerance control for a secure fitSpecsCompatibility: AR-15 platformsAdjustment: 4-position; overall stock length approx. 4.28 inchesMaterials: Impact-resistant polymer stock; Mil-Spec diameter aircraft aluminum extension tubeFinish: Flat Dark Earth (FDE)Included Components: Extension tube, buffer, buffer spring, receiver end plate, castle nutCountry of Manufacture: USAUPC: 4717385552777Manufacturer Part Number: RBUS4DMBrand Name: 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.