Resident Evil: Operation Raccoon City

Buy 5 of those weapons below for the achievement.

List of weapons needed to count towards the achievement:

Primary Weapons:
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Burst Rifle [7,000xp]
Militia Rifle [8,000xp]
Suppressed Rifle [8,000xp]
Hammer [8,500xp]
Ravager [9,000xp]
Tactucial SMG [5,000xp]
Mini SMG [4,000XP]
Suppressed SMG [4,500xp]
Advanced SMG [5,500xp]
Light Machine Gun [7,000xp]
Machine Gun [8,000xp]
Heavy Machine Gun [9,000xp]
MOB Special [25,000xp]
Assault Shotgun [7,000xp]
Juggernuat [8,000xp]
Riot Gun [7,500xp]
Semi Auto Rifle [5,000xp]
Precision Rifle [6,000xp]
Arbiter [7,000xp]

Secondary Weapons:
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Handgun SP [4,000xp]
Handgun HP [4,500xp]
Lighting Hawk [27,500xp]
Samurai Edge [25,000xp]

Total XP needed for all those weapons are;
210,000xp for all those weapons.

You can earn those xp by playing lot of online or lot of story.

Good Luck Guys!