The upcoming 1.2 update is bringing with it some substantial changes, most notably the Hijack Extraction feature (that's proving a little divisive), and new mission types Search and Destroy and High Value Targets. Now we have news regarding the four new gear sets coming in the update. Detailed below following their announcement, you can see the different sets and the way they'll affect your stats.
Hunter's Faith
2) +20% Marksmen Rifle critical hit damage
3) +20% Damage to elite
4) Hitting an enemy with a bullet grants you temporary armor. The further your shot, the more armor. The armor disappears after one bullet hits you.
Lone Star
2) +100% Ammo Capacity
3) +1000 LMG Damage
3) +1000 Shotgun Damage
4) When the weapon is holstered, it regains full ammo.
Final Measure
2) +50% Exotic Damage Resilience
3) +15% Protection from Elites
4) The throwing a grenade, gain the defuse buff. When in range of a hostile grenade, the buff is consumed and defuses the grenade as well as gives you a grenade.
Predator's Mark
2) +20% Optimal Range
3) +800 Assault Rifle Damage
3) +700 Pistol Damage
4) Hit 10 shots without switching target to make the target bleed for 100% of damage already done by those bullets.