For example no one in the world actually knows what 'control' does
Most people say it's about sniper scope sway and hold breath time but it's been proven that it doesn't effect them (by BIG Bodsta on youtube, video called 'Comparisons of gun stats')
And no one seems to know what 'heavy armor damage' does because it definitely doesn't damage tanks/LAVs which is what the wiki says
The description of the stats should 100% be written somewhere in the game