No Scope on Call of Duty 4

Hitting successful no scopes is humiliating to the opponent, and earns you notoriety.

Steps

Use a bolt sniper rifle which are the M40A3 and the R700. Do not choose a semi-auto, as you will end up spamming bullets!
Choose the perks:
- Bandolier (Chances are, you will miss most of the time.)
- Stopping Power (For one shot killing. If you play on hardcore, use Sleight of Hand.)
- Steady Aim (To increase hip-fire accuracy which is the whole idea of no scoping.)
Equip an ACOG scope, as it will increase damage. ^[1]
Use a no scope trick such as strafe shot, crouch shot, prone shot, weapon-switch shot, g-shot, etc. Everyone has different preferences. These tricks can be considered 'exploits', as they take advantage of the fact that there are certain times where the bullet is closer to the center when you no scope.
- Strafe shot - As soon as you no scope, move sideways. You might want to accompany this with a fast movement of the gun.
- Crouch shot - As soon as you no scope, crouch down. You must do this almost simultaneously.
- Prone shot - Just go to prone position before firing, because the cross hairs are the smallest when you are in prone.
- Weapon-switch shot - Press the 'weapon switch' button two times quickly, then shoot when the cross hairs shrinks to its smallest position
- G-shot - Move sideways, then shoot when the cross hairs shrinks to its smallest position.
Practice on a private match, on a wall.

Most semi-auto sniper rifles are easier to no-scope with but are considered noob snipers when used to no-scope.
Try to learn to use no scope at long range. Its easy to no scope at close range and medium but if you are good enough long range shots won't become a problem.
You can learn how to 360 no-scope easily if you can no-scope.