The KR7 series of keymod handguards has taken the AR industry by storm because of its simplistic accessory mounting, and light weight. The KR7 is one of the lightest handguards to date, but you can still add accessories along the entire handguard length, even at every 45 degree position. Note: This handguard features a "T" marked extended top rail. It has a free-floating design and is made from 6061-T6 aluminum with hardcoat anodized matte black finish. This handguard is 4.25" long.