The Ergo 4821 .750 Low Profile Gas Block is designed to fit under the Ergo Modular and SuperLite™ Rail System as well as most other manufacturer’s free float handguards. Melonite QPQ finish for durability and machined from 4140 chromoly steel with chamfered edges featuring a slip on fit for ease of installation and secured with two set screws. - CNC machined 4140 chromoly steel - Nitride/Melonite QPQ finish - Chamfered edge slip on fit - USA made steel & machined in the USA - Weighs 2oz - Fits under most free float handguards - Internal Diameter 0.750 - Includes (2) set screws for a secure attachment - Accepts standard gas tube roll-pins (roll?pin NOT included)
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