Armaspec S3 Enhanced Trigger Guard OD Green. The Armaspec S3 also removes the gap between the grip and trigger guard and creates a uniform look. The Armaspec S3 is a drop in replacement and is made from billet aluminum. Specifications for Armaspec S3 Enhanced Trigger Guard: Manufacturer: Armaspec Gun Make: AR Platform Gun Model: AR-15 Fabric/Material: Billet Aluminum Condition: New Country of Origin: USA Features of Armaspec S3 Enhanced Trigger Guard Coming Soon Package Contents: Armaspec S3 Enhanced Trigger Guard What firearm models does the manufacturer say Armaspec S3 Enhanced Trigger Guard is compatible with? The manufacturer suggests that Armaspec S3 Enhanced Trigger Guard is compatible with AR-15Armaspec ARM130-ODG: S3 Enhanced Trigger Guard OD Green