The Daniel Defense Omega Rail is a light weight free float rail system designed to use the existing Delta ring without modification. This two piece rail utilizes a Patent Pending System which allows the upper receiver to have a continuous uninterrupted upper rail platform, while allowing for a simple and rapid installation. Features *Built in QD mount with overtravel limiter *Aircraft grade Aluminum with Type 3 hard coat anodizing *User installed drop in unit which requires no modification to weapon *Estimated weight of 8.5 ounces including Delta ring and barrel nut *Mounting screws are coated with thread locker *No tools aside from a flathead screwdriver & the included allenwrench are required for installation. *Preproduction model pictured, the final production is marked patent pending For additional information and high resolution pictures, an in depth review can be found at this link. A complete installation guide with high resolution pictures can be found at this link.