has ALL fields of a gun (that I can find) included.
shell count, velocity, spread, scale, color, lifetime (time in the air), damage, impact force, muzzle flash, round burst count, time between burst ...
no idea what is the shell count thing responsible for.

The rotary cannon is the "flamethrower" with 1 damage (default is around 20) but fires 40 times per second. The wing gun on top have the same firing frequency, but does -1 damage instead ("heals" parts). Both guns are set to have no impact force but clearly this can change.
uh ... oh, color code.
The color code is hexadecimal RGB coding.
first two bit (left-most) stores RED value.
a FF value is 255. a 10 value is 16. a 0A value is 10.
second bit stores green and third bit stores blue and BLAH BLAH ...
have fun ;)