Features Licensed by Primary Weapon Systems Aluminum alloy construction Full 7" front assembly, rail, outer barrel and compensator 7" Diablo rail features top, bottom and side 20mm accessory rails and QD sling points 7" Madbull outer barrel PWS licensed Diablo mock compensator Can be mounted to most M4/M16 Airsoft AEGs Inner barrel and hop-up NOT included Manufacturer: Madbull / PWS Specifications: Length: 10" Compatibility: Tokyo Marui, G&G, and other compatible M4/M16 series Airsoft AEGs Material: Aluminum alloy