Tiger Rock M Operator Enhanced Drop In Trigger Guard Aluminum 6061 T6 Black Small. Enhanced Mil Spec Trigger Winter Guard. Designed for smooth operation for all types of combat situation. Specifications for Tiger Rock M Operator Enhanced Drop In Trigger Guard: Manufacturer: Tiger Rock Color: Black Fabric/Material: 6061-T6 Aluminum Condition: New Package Contents: Tiger Rock M Operator Enhanced Drop In Trigger Guard Tiger Rock TG-A: M Operator Enhanced Drop In Trigger Guard Aluminum 6061 T6 Black Small