- Made from Aircraft Grade Aluminum - Incredibly light and durable design - High Density Foam Cheek Rest - QD Sling Swivel Attachment Points on each side (QD Swivel not included) - Comfortable Rubber Buttpad Dimensions: 208mm x 117mm Compatibility: All M4 / M16 AEG Receivers with Buffer Tube Attachment point Materials: Aircraft Grade Aluminum, High Density Foam, Rubber Manufacturer: Madbull (Licensed by ACE Stock) Installation Note: Some trimming of the lower receiver buffer tube attachment may be necessary to fit this stock.