My Call of Duty 4 perks include

Sniper -

M403
Desert Eagle
Bandolier
Stopping Power
Iron Lungs/Deep Impatct.

This is perfect is you wanna sit and snipe on a long/large map. Not recomend for running and gunning.

Sub Machine Gun

P90
Desert Eagle
Bandolier
Double Tap/Stopping Power
Steady Aim

THis is good for getting up close and personal with the enemy.

Assult

M16 Red Dit Sight
Desert Eagle
Bandolier
Stopping Power
Deep Impact

This is good for long and close range as the stopping power only needs to hit once to kill the enemy.

Undercover

Mp5 Silencer
Any Pistol with Silencer
Bandolier
UAV Jammer
Steady Aim/Deep Silencer

This is one of my favourite wepons. Good if you want to get behind the enemy on regular occasions.

Shotgun

M1014
Desert Eagle
RPG
Sleight of Hand
Martydom

This is for when you having a bad day and you want some easy kills, will also induling in some "noob" like activitys.