It is a collaboration model of the games "Dolls Frontline" and "Little Armory". Assembling the runner kit completes the gun body and various optional parts corresponding to it. Includes a special illustration card for ST AR-15.

The civilian version of the US military rifle "M16" is called the "AR-15". There are various clone models made for the private market in this AR-15, and it has an ambitious function and structure that can not be realized with military equipment that puts universality and reliability first. There are also many models. Girls Frontline ST AR-15 is one of those clone models. Its appearance built up with custom parts gives off a charm that is a bit different from the guns of other AR platoon members made of military standard products.