Armor
The ranger is definitely an adventurer profession and wears medium armor.
Weapons
Aquatic
Harpoon gun - Use ranged attacks to strike numerous foes and makes use of the underwater environment.
Spear - Keep foes at bay with close variety spear stabs and swipes.
Two-handed
Greatsword - A brute force, heavy-damage weapon with emphasis on countering and evasion.
Longbow - Powerful sniping weapon, used for fast fire strikes or barrages at lengthy distance.
Brief bow - Fast skirmishing weapon relying on movement, positioning and circumstances for quick kills.
Main-hand
Sword - Mobile melee strikes which can be utilized to distance the ranger from the target or surprise them from behind.
Axe - Medium ranged throwing weapon which can ricochet off a target or can toss a cluster of axes.
Off-hand
Axe - Enter a stance to reflect incoming strikes or throw the axe for a boomerang impact.
Dagger - Used as a crippling ranged attack, or a quick poisonous stab for melee.
Torch - Throw the torch at enemies for burning damage, or light areas on fire.
Warhorn - Utilized to deal damage over time or buff allies.
You will find eleven possible weapon sets for this profession and it can access two weapon sets while underwater. The ranger can equip and alternate between two weapon sets rapidly while in combat.
More Information at guild wars 2 ranger skills
guide.