The Presma low-profile gas block fits AR barrels with a .750" gas journal and sits low enough to clear free-float and standard handguards. It is machined from stainless steel and retained with set screws.

Features:

• Low-profile AR gas block
• Fits .750" gas journal barrels only
• Stainless steel construction
• Set-screw retention
• Sits under free-float and standard handguards

Confirm your barrel has a .750" gas journal before ordering — this block does not fit .625", .875", or .936" journals.