Ways to get everything in BF3 FAST

CO-OPERATIVE MODE

Co-op offers a total of 7 guns available for use in multiplayer. To get all 7 you need a total co-op score exceeding 441,000 points.

These guns include:
-MP412 Rex (Pistol) 63,000 points needed
-KH2002 (Assault Rifle) 126,000 points needed
-MP7 (Submachine gun-engineer) 189,000 points needed
-M39 EBR (Sniper-Scout) 252,000 points needed
-93R (Raffica(Pistol)) 315,000 points needed
-SG553 (Submachine gun) 378,000 points needed
-G3A3 (Assault Rifle) 441,000 points needed

There is also 7 mission in Co-op.

Operation Exodus-
Operation Exodus is pretty straight forward. It has no real technique that is needed other than simply getting through it.

Fire from the sky-
This coop mission is needed along with Exodus to unlock Exfiltration. This mission is by the hardest for those who hate learning to fly or use vehicles. The whole mission is done by helicopter. One pilot, and one gunner. The pilot can shoot missles but unless you've had experience I'd avoid doing so. If your buddy isn't good at flying nor are you the best thing to do is pay attention to the grid when flying. If you can keep it at 0 you can almost hover and let your gunner do all the killing.

Exfiltration-
Exfiltration is the first "stealth" based mission and an intro into simultaneous killing to "Drop 'Em Like Liquid" (The 6th mission of co-op). The hard part and possible achievement is staying silent and stealthy in the beginning. You will be given a silenced M9 which I'd recommend using. You will run into many two enemy rooms where you and a team mate need to kill them at the same time. You also have security cams and other obstacles before reaching the room with a few men and the hostage you must retrieve. You then will continue to fight your way through town by jeep for the extract.

Hit & Run-
Hit and Run is fairly easy. You just have to fight your way through the mission. At one point there will be a door you can't open and an ammo crate close by. If you break all the windows and stay by the ammo crate you can throw grenades one after another at the counter attack wave. Once you finish with that the only other hard part is the door stacking. The enemies love to knife right when you breach. I'd recommend taking a shotgun and holding down the trigger while the cutscene goes on otherwise YOU WILL GO DOWN.

Drop Em' Like Liquid-
This whole mission is based on silent execution like that of Exfil. However unlike close quarter killing, this mission is all based on sniping. You must snipe at the same time as your buddy and go for headshots, for later on chest shots can blow your cover. There is two time sin the mission where doing so is very hard yet still you can go on. After the bus part, along with that of the sniper ambush is the only part in which you can mess up. From start until the buses, if you mess up you lose. Same with sniping at the embassy.

11th Hour-
This is the final and biggest mission in importance to getting points. The mission starts with you in a subway. After you fight your way through and defuse the bomb on the subway you then proceed into the stock market building and eventually kill an HVT. However the reason you MUST get to this level for fast points is for two reasons. One way is right at the subway exit there is a group of police fighting men in the entrance of the stock exchange building. If you DO NOT go up the stairs and into the building they will continue to spawn over and over and over. There is an ammo crate in the subway area right before this part. Doing this method can yield about 50,000 points in a 25-30 minute game. Another way to gain points fast would be to go on Easy difficulty and literally not stop running but rather run and gun then purposely mess up the bomb defuse. Each time of doing this takes about 2-3 min at max and yields 5,000 points. Doing this 4-5 times takes about 10 or so minutes and can yield p to 25,000 score or more. This method is believed to be the fastest.

MULTIPLAYER

Multiplayer Legit: is where everyone wants to get guns.
Simply put the best modes to rank up are Rush and Conquest. Personally I like rush. Each game can yield around 5,000-10,000 points depending on performance.

Boosting: Boosting in BF3 is fairly easy and pretty common. If you see a colonel in a public game, especially one that isn't that great, there is a high chance he did this. If you get 8 people (or a full XBL party (perfect right?!)) then you can search for a server that has 0/8 people. If you search Hardcore Squad Rush Ranked then find a 0/8 person game you can invite everyone to it and lock the server down for your on benefit. Doing this then there is two teams of 4. Split into two groups of 4. 8 / 2 = 4. Make sure everyone has defibs and assault class chosen. Proceed to have one person kill. Two team mates in a old western style stance against two enemies. When your buddy is shot, revive him and then kill the person who shot him down. Continuing to do so will create you a nemesis and avenger rewards. The nemesis points will eventually rise to over 1000 points a kill and can yield in a whole game upwards of 300,000 points. That's more than enough to rank 10 times.

There is also Kit boosting which is for those classes other than Assault. I see them as the CoD style boosting. You can lock the lobby the same way as previously stated. However instead of groups of 2 made of 4 people you can do it with 3. One person killing (Whatever class type they want), one person dying, and one reviving. You can then switch off and eventually rank up all your kits so that you have every Multiplayer gun and equipment in the game.

I will continue to add more to this as I find suitable. Nothing is copy/pasted or plagiarized. I wrote this whole thing based on my knowledge. Which is Im a Colonel lvl 1 and have all Assault weapons and All kit weapons unlocked + all 7 co-op guns, co-op beaten, campaign beaten, etc. If this helped you or if you have questions. Comment below! Thanks.

-Tango1