Fiber reinforced polymer build as an upgrade for the product's life span. Easy installation for the user to modify their attachments. Accessory is universal that work the same as the 5.56/.233 rifles and 7.62/.308 rifles handguards. Scout mount is measured at 1.25 that puts the user at an advantage against other competitors. Product easily mounts onto threaded fasteners for quick placement. In the Box 1X Scout Mount 1X Mounting Hardware Specifications: Manufacturer Centurion Arms Model CMR Flashlight Mount Material Fiber Reinforced Polymer California Proposition 65 Warning: Cancer and Reproductive Harm - www.P65Warnings.ca.gov