The weapons that the soldiers carry are airsoft guns. A clear example occurs at around the 11 minute mark, where the viewer can view into the ejection port of a rifle, where an airsoft "hop-up" mechanism can clearly be seen. This would make sense since it would be difficult for an independent production company, with an extremely low budget, to be able to secure permits for the use of a proper armorer, especially in a country with extremely strict firearm laws.