Product DescriptionThe UTG PRO Model 4 Combat Ops S1 Mil-Spec Butt Stock Kit is a rugged, weather-resistant, AR-15/M4-style collapsible stock system engineered for a secure, rattle-free fit. Built around a high-impact polymer stock body and a mil-spec diameter extension tube with rolled threads, this kit is designed for dependable performance under hard use. Comfort and control are enhanced with chamfered edges, a slanted cheek rest, and a built-in rubberized recoil pad, while sling-ready features include a reversible quick-detach (QD) sling swivel housing and an ambidextrous sling loop. This complete kit includes the extension tube, buffer, buffer spring, tear-drop ring, and castle nut for installation.Product Highlights Six-position adjustable/collapsible AR-15/M4 buttstock kit for mil-spec buffer tubes High-impact, weather-resistant polymer stock construction for hard-use reliability Rolled-thread mil-spec diameter extension tube designed for a precise, rock-solid fit Reversible QD sling swivel housing plus ambidextrous sling loop attachment for flexible sling setup Comfort-focused design with rubberized butt pad, chamfered edges, and slanted cheek restSpecs Brand: Leapers, Inc. - UTG Manufacturer Part Number: RBUS1BM UPC: 4717385550896 Product Type: Buttstock Kit (Collapsible/Adjustable) Platform/Fit: AR-15 / M4 style; fits most AR-15 variants Color/Finish: Black Adjustment: 6-position Materials: Impact-resistant polymer stock; aluminum extension tube (hard coat anodized) Length: 9.06 in Height: 5.11 in Weight: 22.4 oz Included Components: Polymer stock assembly; mil-spec diameter 6-position extension tube; buffer; buffer spring; tear-drop ring; castle nut Country of Manufacture: USADisclaimer: 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.