Ergo AR-15 Gas Block .750 Low Profile - 4821

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.CNC machined 4140 chromoly steelBlack Nitride/Melonite Quench Polish Quench (QPQ) finishChamfered edge, slip on fitWeighs 2 ozFits under most free float handguardsUSA made steel & Machined in the USAInternal Diameter 0.750 inchesIncludes (2) set screws for a secure attachmentAccepts standard gas tube roll-pins (roll-pin NOT included)