Who plays it?
What is your favorite map?
Preferred play style?
Tell me things.
Resources
This website shows you everything you need to know about the game from the basics of how to play, modes, combat, and maps to the more advanced features such as ballistics, weapon modding and armor types/classes.
Interactive Weapon Modding Utility:
Choose a weapon and it'll show you which attachments are available to purchase and use for that weapon.
You can modify a stock weapon, such as this ADAR...
...Into an absolute monster with a thermal scope on it that will look like this...
All with the help of that utility!
Another resource is the ammo chart made by NoFoodAfterMidnight
The chart linked above as a comprehensive sheet of all the ammo types, how much damage they do, and more importantly how well they penetrate classes of armor.
FYI: The ammo chart is used by a TON of people, so during peak hours it may load sluggishly.