Geonox Airsoft looks at another licensed Colt M4 from Cybergun, the Cybergun Colt M4 Blast Red Fox AEG... "In this video we look at the Colt M4 Blast Red Fox from Cybergun. It is a SAEG (Semi Automatic Electric Gun). It is battery operated and since it is 0.9 joules above the magical 0.5 joules limit, it only has semi no full auto. A charger and a battery are included in the scope of delivery. You will also find an extra spring that gives you 1 joule.