Guntec USA .50 Beowulf Multi Port Steel Compensator. 50 Beowulf Cal Just Released Specifications for Guntec USA .50 Beowulf Cal Multi Port Steel Compensator: Manufacturer: Guntec USA Color: Black Caliber: .50 Beowulf Fabric/Material: Steel Gun Model: AR-15 Condition: New Package Contents: Guntec USA .50 Beowulf Cal Multi Port Steel Compensator What firearm models does the manufacturer say Guntec USA .50 Beowulf Cal Multi Port Steel Compensator is compatible with? The manufacturer suggests that Guntec USA .50 Beowulf Cal Multi Port Steel Compensator is compatible with AR-15GUNTEC USA TANK9-50: .50 Beowulf Multi Port Steel Compensator