Ergo Enhanced Machined Aluminum Trigger Guard Black. The ERGO Trigger Guard features two rounded channels on the exterior and is designed to fit with most AR-15 grips. It is a great way to give your rifle a custom look and a unique visual appeal. Ergonomically designed to allow easy use even with gloved fingers. Machined from 6061-T6 aluminum and Type III black hard coat anodized. Specifications for Ergo Enhanced Machined Aluminum Trigger Guards: Manufacturer: ERGO Gun Make: AR Platform Color: Black Finish: Type III Black Hard Coat Anodized Fabric/Material: 6061-T6 Aluminum Features of Ergo Grip Enhanced Machined Aluminum Trigger Guard 4240: Anodized Aluminum Package Contents: Ergo Enhanced Machined Aluminum Trigger Guards Ergo Grip Enhanced Machined Aluminum Trigger Guard 4240-B