From Halo Bulletin 8-15-12:

Pathfinder Specialization: Spartan optimization for deep, unconventional deployment within unknown enemy territory and with little to no assistance from command.

Gunner Armor Mod: The Gunner armor mod decreases the time of weapon overheat when occupying a vehicle weapon position and increases Spartan speed while carrying a detached turret.

The Gunner armor mod – which was designed to explore alien worlds – has two major functions: One, when you’re on a mounted anti-infantry gun (Warthog and the secondaries of Wraith, Scorpion, etc.), the guns overheat less quickly, allowing you to fire longer at the maximum rate of fire. And two, when you pull the gun off an emplaced mount, you move faster, allowing you to use those guns more effectively offensively instead of just defensively. You still won’t be able to use Armor Abilities or Sprint, but you can move faster, bringing some heavy firepower to any offensive attack.

HFFL’s thoughts:

Objective: Mounted weapons overheat slower, move quicker than normal with ripped off turrets

Subjective: Yes! This mod has some uses for me. Mostly as a gunner. I’m both a driver and gunner, so the ability to slow down the amount of time it takes for my gun to overheat is going to help rack up those kills with less worry about having to wait for cool down. I’m not big on ripping off turrets and walking around with them though. You’re a big target, even if you can move faster.

Armor: I like it. Shoulder armor is tough looking. Now about that “Cylon” helmet? It’s not too bad, but maybe the helmet is just a smidge too wide? Well for me anyway.

Emblems: Hmm, these one kind of perplex me. I do like the one at the bottom.