I have two loadouts that i mostly use (although i havnt played enough recently to know how if they are efficiant compaired to others)
NAME: The Spearheader
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Primary: BR
Secondary: Magnum
Grenade: Frag
Aromor Ability: Regen Field
Tactical Package: Explosives
Support Upgrade: Grenades
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this is my usual loadout, weather im sticking with the team, fighting on my own, or stupidly charging 4v1, this is flexible enough to suit all my need. "I dont always play halo 4, but when I do, I use this."
Name: The Surprise Suppressor-To-The-Face
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Primary: Carbine
Secondary: Suppressor
Grenade: Frag
Armor Ability: Hologram
Tactical package: Firepower (duh)
Support Upgrade:Dexterity
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This class i use for smaller maps, even though the carbine is a bit better at range than the BR... anyway, I can take on anyone at range with my Carbine, and swich to my Suppressor (underestimated weapon IMO) if they get in too close.
let me know what you guys think!