Modifying cfgWeapons questions

[flyingsaucerinvasion 3]

How can I find the game's default cfgWeapons, so that I can see complete entries and begin to understand what things mean?

 

In particular I want to change weapon dispersion and recoil. 

 

While looking at mods that do similar things, I cannot discern what the following entries mean, or why different weapons have different entries:

 

class Single : Mode_SemiAuto
class Burst : Mode_Burst
class FullAuto : Mode_FullAuto
class Single : Single
class Burst : Burst
class FullAuto : FullAuto
class manual : Mode_FullAuto
class manual : manual
class LowROF : Mode_FullAuto
class HighROF : LowROF
class close : manual
class short : close
class medium : close
class far : close
class short : short
class medium : medium
class far : far
class manual : MGun

 

What is the exact difference between these?