Stats
Many of the stats are pretty self explanatory to those who have played MMO's.
STR: Your characters strength. STR increases physical damage. Your attack power will be based on how much STR you have total.
(Your total Physical Damage is whatever your STR is. Adding 1 point = +1 Damage)
DEF: Your defense. This increases your HP, as well as your defensive power. Higher defense means less chance of dieing.
(Your total Physical/Ranged Defense is whatever your DEF is. Increasing your DEF by 1 will increase your Defense by 1. DEF is also your HP. 1 point = +5 hp)
DEX: Dexterity. This stat does a variety of things. It increases Aim and Ranged Attack Power. Increases your critical chance for all types of attacks.
(Your total Ranged Attack Power is whatever your DEX is. Increasing your DEX by 1 will increase your Ranged Attack by 1. DEX is also your Critical Rate. 1 point = +.2% Crit)
WIS: Wisdom. This effects the amount of MP you have, as well as your magical defense.
(Your Magical Defense is whatever your WIS is. 1 WIS = 1 Magical Defense. 1 WIS = +5 MP)
INT: Intellect. The most needed stat by magic users, but most unneeded by others. All it does is increase magic damage.
(Your magic damage is whatever your INT is. 1 INT = 1 Magic Damage)
LUK: The only stat with no description. What this stat does is currently unknown, and has rarely ever been seen.
Weapon Stats
Weapons are equipped with the same regular stats as above, but they are limited on how much they can have per level. In the lower levels, the stats may be quite high, or low for the weapon. But after level 20, the stats on weapons get much higher, but also get a cap. The highest stat a weapon can obtain is double it's level, then +1. For example, a level 20 weapon's max stat for any stat would be 41. This of course does not apply to weapons of high rarity, as they can surpass the stat cap freely.