Specifications Material: CNC Machined Aluminum Weight: 8g Color: Red Compatibility: Most M4/M16 Airsoft AEG lower receivers Package Includes: 1X Magazine Release Catch Conversion Set, 1X Star Key Features CNC anodized aluminum provides an excellent strength-to-weight ratio and natural corrosion resistance Compatible with most M4/M16 Airsoft AEG lower receivers Easy installation does not require modification Accessible to ambidextrous reloads Skeletonized, textured, and enlarged release paddles enhances reload time