Product Description The Phase 5 Weapon Systems Rifle Length Mini Stock Assembly (RMSA) is a fixed stock solution for AR platform rifles that combines the Universal Mini Stock (UMS) with a rifle length HexOne buffer tube. Built to complement the thicker, rugged hexagonal receiver extension, the kit is precision machined in-house from USA-sourced billet aluminum for strength and durability. The UMS features a smaller footprint and a bottom curve designed to provide a superior chest anchor, helping the operator move in and out of position more easily. Product Highlights Combo kit includes Phase 5 Universal Mini Stock (UMS) and rifle length HexOne buffer tube for a compact fixed-stock setup HexOne buffer tube features a thick hexagonal profile for increased ruggedness versus typical mil-spec receiver extensions UMS designed with a smaller footprint and bottom curve for improved chest anchoring and positional transitions Precision machined in-house from USA-sourced billet aluminum for a durable, premium fit and finish UMS is compatible with additional buffer tubes, including mil-spec carbine receiver extensions and most round tubes Specs Brand: PHASE 5 WEAPON SYSTEMS Manufacturer Part Number: RMSA UPC: 813318023292 Product Type: Rifle length mini stock assembly (fixed stock solution) Included Components: Universal Mini Stock (UMS), rifle length HexOne buffer tube Color/Finish: Black Materials: HexOne buffer tube 7075-T7 aluminum; UMS 6061-T6 aluminum Overall Length (OAL): 10.50 in Weight: 1.61 lb Butt Pad: Rubber Compatibility: AR15/AR10 platforms (UMS also fits mil-spec carbine receiver extensions and most round tubes) 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.