Welcome to the Mw3 Mega Info Thread!
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*If you feel i am missing something, feel free to PM me.*

GUNS

Primaries:

Assault Rifles:

M4A1: LVL 4

M16A4:LVL 4

SCAR-L: LVL 6

CM901: LVL 18

Type 95: LVL 32

G36C: LVL 42

ACR 6.8: LVL 50

MK 14: LVL 60

Ak-47: LVL 68

FAD: LVL 78

SMG:

MP5: LVL 4

UMP45: LVL 4

PP90M1: LVL 28

P90: LVL 38

PM-9: LVL 56

MP7: LVL 74

LMG:

L86 LSW: LVL 4

MG36: LVL 4

PKP Pecheneg: LVL 14

MK46: LVL 54

M60E4: LVL 72

Shotguns:

USAS 12: LVL 4

KSG12: LVL 4

SPAS-12: LVL 8

AA-12: LVL 26

Striker: LVL 48

Model 1887: LVL 62

Sniper Rifles:

Barrett .50Cal: LVL 4

L118A: LVL 4

Dragunov: LVL 12

AS50: LVL 22

RSASS: LVL 44

MSR: LVL 66

Riot Sheild

Riot Shield: LVL 4


Secondaries:

Machine Pistols:

FMG9: LVL 4

MP9: LVL 16

Skorpion: LVL 36

G18: LVL 70

Handguns:

USP .45: LVL 4

P99: LVL 10

MP412: LVL 30

.44 Magnum: LVL 46

Five Seven: LVL 58

Desert Eagle: LVL 76

Launchers:

SMAW: LVL 4

Javelin: LVL 24

Stinger: LVL 40

XM25: LVL 52

M320 GLM: LVL 64

RPG-7: LVL 80


PROFICIENCY

Kick - Reduced recoil when firing.
Impact - Bullets carry more damage through material.
Attachments - Two attachments can be added to a weapon.
Focus - Reduced flinch when hit.
Breath - Hold breath when aiming down the sights.
Stability - Reduced weapon sway while aiming down the sights.

PERKS

Perk 1
Recon - Explosive damage paints the target on the mini map * NEW
Sleight of Hand - Faster reloading
Blind Eye - Undetectable by air support and sentries * NEW
Extreme Conditioning - Sprint for longer distances
Scavenger - Resupply weapons ammunition

Perk 2
Quickdraw - Faster aiming * NEW
Blast Shield - Increased explosive resistance
Hardline - Killstreaks require one less kill
Assassin - Undetectable by UAV, portable radar, thermal and heartbeat sensors * NEW
Overkill - Carry two primary weapons

Perk 3
Marksman Identify enemy targets at longer range * NEW
Stalker - Move faster while aiming * NEW
Sitrep - Detect enemy explosives and tactical insertions
Steady Aim - Increased hip fire accuracy
Dead Silence - Reduces footstep noise

Killstreaks

Here is a list of rewards for this Assult Package:

3 Kills
UAV - Shows enemies on the minimap

4 Kills
Care Package - Airdrop a random killstreak or ammo

5 Kills
I.M.S. - The Intelligent Munitions System detects and eliminates enemy combatants
Predator Missile - Remote control missile
Sentry Gun - Airdrop a placeable sentry gun

6 Kills
Precision Airstrike - Call in a directional airstrike

7 Kills
Attack Helicopter - Call in a support helicopter

9 Kills
Strafe Run - Strafing run of 5 Attack Helicopters
Little Bird Guard - Get personal air support from a Little Bird guardian
Reaper - Lase missile targets remotely from the Reaper UAV

10 Kills
Assault Drone - Airdrop an Assault Drone

12 Kills
AC130 - Be the gunner of an AC130
Pave Low - Heavily armored Assault Helicopter

15 Kills
Juggernaut - Receive advanced armor via care package

17 Kills
Osprey Gunner - Be the gunner of an Osprey delivering
several care packages

Here is a list of rewards for this Support Package

UAV (4 kills)
Shows enemies on the radar as red dots for 30 seconds. Enemies that have the Assassin perk equipped are not shown on the radar.

Counter UAV (5 kills)
Temporarily disables enemy radar for 30 seconds.

Ballistic Vests (5 kills)
Drop a bag to the ground that supplies your teammates with Ballistic Vests. Every teammate that picks one up gets increased armor and damage resistance.

Airdrop Trap (5 kills)
Drops a rigged Care Package that explodes once the enemy tries to reach for its contents.

SAM Turret (8 kills)
After deployed, the SAM Turret automatically attacks enemy air support.

Recon Drone (10 kills)
Controllable UAV helicopter. Use it to mark/tag enemies so your teammates can see them.

Advanced UAV (12 kills)
Reveals both the position of the enemy as well as the direction they are facing for a brief period of time. Enemies using the Assassin perk will not be detected by the Advanced UAV.

Remote Turret (12 kills)
Deploy and manually control a Remote Turret. You can enter and exit the turret view at will, and also re-deploy the turret at any time.

Stealth Bomber (14 kills)
Carpet bombs the selected area. Undetectable and can't be shot down by the enemy.

EMP (18 kills)
Temporarily disables enemy electronics and knocks out all enemy air support.

Juggernaut Recon (18 kills)
Receive the Juggernaut suit, equipped with the USP .45 handgun and a Riot Shield. Lowers mobility, but makes you more resistant to damage.

Escort Airdrop (18 kills)
An AI controlled version of the Osprey Gunner killstreak. It drops Care Packages and also defends them.


Here is a list of rewards for this Specialist Package

Perk (2 kills)
Selected perk is activated.

Perk (4 kills)
Selected perk is activated.

Perk (6 kills)
Selected perk is activated.

All Perks (8 kills)

All 15 perks are activated. Works the same way on the Xbox 360, PlayStation 3 and PC.

If this thread has helped you in any way, please drop a thank!
*If you feel i am missing something, feel free to PM me.*
I have compiled all this from many different sites. I DID NOT COPY ANY FELLOW TTG MEMBERS POSTS