Aluminum .936 Low Profile Gas Block + Roll Pin for .223/5.56

Low profile luminum .936 gas block, with 1913/picatinny-style rail, permits mounting iron sights, flashlights or laser aiming devices. Fit on .936" heavy barrels. Locks solidly to barrel with dual set screws.Description:Military industry Quality StandardsShaft material: imported T7075, aerospace aluminum alloy.Surface treatment: HA III Military grade hard anodized.Precision CNC digital machine tools. Professional precision quality guarantee.100% Satisfactory Guarantee 21mm Top Rail allow installation of scope, sight, torch, laser Easy to hook up Constructed of full metal material, extra strong shock absorption abilityRing size:19MMWeight: 2.7oz