On the data cards for the different units it has stats for weapons.
Now train your eye to the name of a weapon and then emedietly to the right is a number or letter which so far as the starter set goes appears to be numbered 1-4 or U.
Anyone have any idea what these are for? It sort of baffled me because it does not appear to relate to anything but has to be there for some purpose. The rule book doesn't identify what they are for either.