
All Classes and Comments are for the Hardcore Mode
This Swift class might seem useless but, Double Tap Perk cuts the reload between each shot in half allowing the scope to centre much quicker putting other players off because of the quicker fire rate.
The ACOG Scope is not as accurate or as distant as the default but is great for almost every map and can still make them long head shots if timing is correct.
The Claymore's Perk are used more of a distraction for this class, making it a very active class without hiding in grass is much easier than most sniper classes.
And Deep Impact Perk allows you to fire through the average wall not just tin sheets.
The Silenced USP.45 Pistol, not as power full as the Desert Eagle but 2 shots will get you a few kills and mostly used for a backup when out of ammo or reloading, even for tricky corners the scope is not needed.
Stun Grenades are great for cleaning a room or making sure your favorite position is clear

The All-Rounder class is pretty much what it says, the G36C with Red Dot Sight is great for just about everything.
C4 Perk allows you to get around corners well or clear behind walls or above you on the move while being safe.
Stopping Power Perk delivers extra damage to your target guaranteeing he does not get the change to retaliate.
Deep Impact Perk will go through walls just as the Swift Sniper class.
And a Flash Bang that i use as a detraction also.

The Ultimate Tube class, some people might think that having to rifles with Grenade Launchers is a waste of Perk, but it is actually very dominating.
We'll start with the G36C, its an All-Rounder which makes its nice when the fire power is needed.
The G3 is perfect for all the long shots that the G36C iron sight just can't compete with the G3 in range.
Overkill Perk is needed to get the second rifle.
Martyrdom Perk. . a very hated Perk in indeed, but can get those who knife you when you are reloading a grenade or just didn't hear them over the explosions.
Smoke Grenade is good for many uses like, vision block out to make an escape or get to where you want, or you could use it as a distraction so people can fire into the Smoke and sneak up on them, or simply use your Grenade Launcher, people do get lost and might be a few in there.
Now tips with the double Grenade Launchers, in total you have 4 Grenades between them both but either rifle can hold a maximum of 3 grenades so the 4th is in the other rifle
If you were to fire one of them off and change weapons before the reload, the other 3 will be in the other rifle, or you can go 50/50 if you have fired and taking damage from a player, simply change from Grenade Launcher to bullets and change gun and that into Grenade launcher it is very quick to do and can save your life.
If you throw away 1 of your rifles does not matter how many grenades were left, they will be lost and you will only have 1 remaining in the other rifle, but when you are done with them it is wise to ditch them and pickup those around you, knowing and using all weapons in COD4 will make this class alone very frustrating to other players.

The Predator Class, one of my favorites to use, the G3 is a power full accurate single shot rifle, combined with a Silencer, Stopping power Perk and Deep Impact Perk you will kill most with just 1 shot even through a lot of the walls, maybe 2 shots needed for some but a very deadly class, Claymore's allow you to hide/camp, or randomly plant in high traffic locations.
A class not to be messed with if you ask me.

Ah the Ghost Class, why the M16 you might be asking, well i say why not, it fires 3 bullets very quickly in a short burst, accurate enough to make some long shots, up close you don't always have to aim.
Just fire from the hip (the key is not to aim them up in the middle of the screen but slightly to one side to take full use of the 3 round burst from the hip lack of accuracy), 3 rounds wont waste your ammo.
UAV Jammer Perk will make you completely invisible to Radar/UAV as long as that Silencer stays on, Dead Silence Perk. .when you walk or sprint you make very little sound but not completely silent those who have their sound a little higher than normal can hear you.
But you are like a Ghost with this class so make the most of it and sneak up for them knife kills. 3x Stun Grenades, can be used to clear rooms or prevent someone from turning around at you so you can make a knife kill, i like using them to finish off players who use Last Stand Perk.
Who doesn't love a stun kill.

The Skorpoison Class is the Skorpion, with its rappid fire and excelent accuracy in long range is quite competitive against the Assault Rifles.
The Bandoleir Perk give you lots more ammo, even taking down a Helicopter is no problem with the Skorpion.
Slight Of Hands Perk give you an advanage when needing to reload so frequently, taking away the ability of your enemy to wait for that reload before he takes you.
Deap Impact Perk, does exactly what it says, although there other Perks like Dead Silence but why use that when you shoot through the walls in rappid fire and ready to fire if he comes out to say howdy.