Which weapon should I choose ?

Ok, so I am This-Is-It.
My favorite weapon is the AWM with a Desert Eagle.
But, to be a good player, I need to control a Rifle. So I must make a choice between
- AK 47
- M4A1
- Scar Light

A lot of you will say "Scar Light is for noobs", but I have a teammate with 2.3 K/D rate playing with this weapon. And I don't care of ppl who will say I am a noob because of the gun I use. The Scar light is a very good weapon, the 3 bullets shot go to the same place => very low recoil, damages are better than M4A1, but I don't like The Skin, the Noise and the fire rate of this weapon.

For the M4A1, there is a good accuracy, but I need not to move to shot with it, if i move bullets go everywhere. Bullets are in Paper (like 27-29 damages for 1 bullet in the body, and if the enemy got a Helmet, bullet in his head make 88 damage) . I really like the noise, and the skin of this weapon, like the fire rate, just the problem of damages.

For the AK 47, I really think that is a weapon for pro. The recoil is very high, and only the first bullet go where you aim, then the second bullet go up. I need to shoot bullet per bllet, or 2bullets per 2bullets. I really love this High lethaly weapon, you put 3 bullets in the body to kill, and 1 bullet in the head (don't care if the enemy got a Helmet) . I CAN'T chot while I am moving, obviously. the problem are the lags, cause the fire rate is slower than M4A1, and I leave in France (so on Clan Server, I have like 150 of ping) and my bullets usually don't touch the enemy. it is logical, if I shot les bullets, I can kill less people, and I must wait that the recoil go to 0 to kill anither enemy.


So I can't choose, I think that for the Power :
1. Ak 47
2. Scar-L
3. M4A1

For the Fire rate :
1. M4A1
2. Scar-L
3. Ak-47

For recoil :
1. AK 47
2. M4 A1
3. Scar-L

If We look Statistics, Scar-L is the more polyvalent weapon. But I have a question on this weapon : if the enemy Have a helmet, and if I shoot in his head, can i kill him wth 1 bullet with the scar-L, ? know that is possible with AK 47, and impossible with M4 A1, but I don't know for Scar-L.

Another thing for Ak-47 users : Do you make good scores with AK 47 ? Is it rly difficult to control ? How long ago did you start playing AK 47 ? How long dod you play for control really good AK 47 ?

Sorry for My english (I am from France)
And thanks for all your answers

This-Is-It