Product DescriptionThe Ruger AR-15 Stock Kit with M4 Stock is a practical replacement or upgrade package for compatible AR-platform builds. Designed around a classic M4-style buttstock configuration, this kit includes the core rear stock assembly components needed for a reliable installation. Based on the provided product data and image, the kit includes an M4-style buttstock, recoil spring, carbine buffer, castle nut, end plate, and receiver extension tube. Ruger is known for durable firearm components, making this kit a solid choice for shooters seeking dependable fit and function.Product Highlights Complete AR-15 stock kit from Ruger with M4-style buttstock and key installation components Includes recoil spring, carbine buffer, castle nut, and end plate for a functional rear stock assembly Receiver extension tube shown in provided product imagery for added assembly convenience Ideal for AR-platform maintenance, replacement, or build projects requiring a carbine-style stock setup Genuine Ruger firearm accessory identified by UPC 736676910076 and manufacturer part number 91007 Specs Product Type: AR-15 stock kit Style: M4-style stock Included Components: Buttstock, recoil spring, carbine buffer, castle nut, end plate, receiver extension tube Platform Compatibility: AR-15 style rifles Manufacturer Part Number: 91007 UPC: 736676910076 Brand: Ruger Disclaimer: 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.