More than just a standard quad-Pictinny Rail, the Ergo Z Float Rail is engineered for maximum performance for both the shooter and the rifle. This two-piece system is thinner than it is tall, making it lighter weight, more compact and easier to grip than other quad rails systems.- Two piece 6061 T6 hard matte black anodized aluminum construction- Thinner profile for enhanced forward control- Easy installation without removing barrel- Black hard anodized finish- Includes Black ERGO LowPro Rail Covers- Requires removal of delta ring- Piston system compatible- Weight: 12.2 ounces