Just finished posting this to an unofficial thread, so here it is now
Since nobody has posted the new achievements...
Cooking With Style - Complete the Rats job with you and your four man crew having Combined Tactical Vests, Vulcan Miniguns, HRL-7 Rocket Launchers and General Overkill masks equipped on the OVERKILL difficulty or above.
I Have No Idea What I'm Doing - In the Shadow Raid job, complete the heist in stealth while having the Vulcan Minigun and HRL-7 Rocket Launcher equipped.
Oh, That’s How You Do It - Fire the Vulcan Minigun for 25 seconds without reloading or letting go of the trigger.
We Are Rockstars On This Job - Complete the Watchdogs job with each crew member using no skills, wielding the AMCAR Rifle and Chimano 88 Pistol on OVERKILL difficulty or above.
Reputation Beyond Reproach - In the Breaking Ballot heist in the Election Day job, complete the heist with you and your four man crew without letting anyone get downed, cloaked or cuffed on the Death Wish difficulty.
House Keeping - In the Big Oil job, complete day one in stealth on the OVERKILL difficulty or above.
120 Proof - Kill 120 or more enemies in any day in any job, with you and your four man crew having at least 120% crew accuracy at the end of the heist.
Boston Saints - Complete the Big Oil job, with at least one other player, all using suits and Akimbo Bernetti 9 Pistols on the OVERKILL difficulty or above.
Bring Your Cop To Work Day - On any heist, have four law enforcers converted at the same time on the OVERKILL difficulty or above.
Wasteful - In the Firestarter job, complete day one having burned all weapons on the Death Wish difficulty.
And the part people care the most about:
Furthermore, here are the new weapon stats
HLR-7 Rocket Launcher
Magazine: 1
Total Ammo: 4
Rate of Fire: 30
Damage: 10,000
Accuracy: 18
Stability: 9
Concealment: 5
Threat: 37
Ammo pickups are disabled
Only mods are custom sights
Vulcan Minigun
Magazine: 750
Total Ammo: 750
Rate of Fire: 3000
Damage: 40
Accuracy: 8
Stability: 5
Concealment: 5
Threat: 37
Ammo pickups are disabled
40% movement penalty when equipped
Cannot use custom sights
Mods for the Vulcan Minigun:
Aerial Assault Kit (Long barrel): Accuracy +2; Stability -3; Concealment -3
The Stump Barrel (Short barrel): Accuracy -2; Stability +9; Concealment +3; Reduces the movement penalty from the Vulcan Minigun
I'll Take Half That Kit: Ammo Capacity -300; Accuracy -2; Stability +9; Concealment +3; Reduces the movement penalty from the Vulcan Minigun
It also accepts laser sights and flashlights.