Ergo Grip Low Profile Gas Block Md: 4821 The Ergo Grip Low Profile Gas Block is CNC machined with 4140 chromoly steel and features a Nitride/Melonite QPQ finish. It has a chamfered edge with a slip on fit. USA made steel and machined in the USA. The low profile gas block weighs only 2 ounces and fits under most free float handguards. Includes two set screws for a secure attachment. Accepts standard gas tube roll-pins (roll pin NOT included).
