The objective is to guess the correct weapon based on 4 stats. Damage, Fire Rate, On Op and Mag Size.
You can type in the name of the weapon, the operator name which will display a list of the weapons an operator has or you type in the weapon type.
There are Assault Rifles, SMG, DMR, Handguns, Hand Cannon (Gonne-6), Shotguns, LMG, Slug Shotguns, Machine Pistole, Revolver, Shield and Sniper Rifle.
The stat bars will show you if you are above or below the values you are looking for.
Good luck!