When are air rifles considered to be licence-free?

According to the current status of the Weapons Act, only those air rifles that have the F stamped in the pentagon are considered to be licence-free, unless they were manufactured before 01/01/1970. Since air rifles are not subject to a weapons book, a search in our manufacturing documents is too time-consuming. However, an inspection and marking of the weapon can be carried out at any time at our factory or at your nearest ordnance office for a fee.