CMC Triggers AR-15 Mil-Spec Trigger Guard Aluminum Black Small. This is a standard mil-spec AR-15 guard machined from aluminum and heat treated so it won't bend if the rifle takes a knock. The black phosphate coating resists corrosion and matches the rest of your hardware. It pins into any standard lower receiver. made in specialized factories. Simple part done right at a price that makes sense when you're building more than one. Specifications for CMC Triggers AR-15 Mil-Spec Trigger Guard: Manufacturer: CMC Triggers Gun Make: AR Platform Gun Model: AR-15 Color: Black Fabric/Material: Alluminum Package Contents: CMC Triggers AR-15 Mil-Spec Trigger Guard What firearm models does the manufacturer say CMC Triggers AR-15 Mil-Spec Trigger Guard is compatible with? The manufacturer says that CMC Triggers AR-15 Mil-Spec Trigger Guard is compatible with AR-15CMC Triggers CMC-AR15-TG-MIL-BLK: AR-15 Mil-Spec Trigger Guard Aluminum Black Small