I'm not brilliant at ARMA but it is brilliant fun, I normally get assigned the M32 MGL or just some big ass LMG where pinpoint accuracy isn't really a requirement 
if you want guns just play MM3 (which is now being made into official DLC!!!)
Nah I think it's cos the best players just stuck with WarbandSandjube said:Mount and Blade I guess.
On a related note, playing Fire and Sword and then switching to Warband is incredibly hard to get used to. The BEST person I saw at F&S is like your below average Warband player. Because all the F&S people never practice melee just sit on walls with rifles.