The Samson STAR SIG 556 3-Hole Tactical Accessory Rail System is designed for the Sig Sauer 556 series, featuring a lightweight aluminum construction that ensures durability without adding unnecessary weight. This two-piece free-float handguard design allows for easy installation and comes equipped with Picatinny rails at the 3, 6, and 9 o'clock positions for versatile accessory mounting. Included with the rail system are two 2-inch rail kits and one 4-inch rail kit, providing ample space for your tactical setup. The top rail measures 19 inches long and is compatible with Sig 556, 556 Classic, and 556R models, though it will not fit the Xi version. Enhance your rifle's performance and functionality with this high-quality handguard.