modern warfare 2 quick scoping?

ok so i know its an old theory or an older idea in call of duty, the truth is? its not very hard.
 people always say well how do you do it, whats your load out?
what gun and perks do you use

ok to finish this i want to tell everyone my load out for quick scoping or just being a sniper period,
1. in order to quick scope you MUST USE A INTERVENTION ( now this is my personal opinion)
2. no matter what people say your secondary weapon will not mess up your quick scoping, a lot of people say you have to use a pistol or handgun. this is not true, i get about 5 quick scope kills every match and i always use a shotgun (preferably the M10 or the Spas-12) this is mainly because of 2 things, the spas has a rediculous range, and damage.

3. my perks are as follows (and no they dont have to be pro)
sleight of hand pro (this is a must and have to have this in order to quick scope)
stopping power pro ( also a must in order to get the one hit kills)
steady aim pro ( i tend to use steady aim pro just to get higher chances for a kill) you can also use ninja or anything really for your third perk

ok so the next thing is just a simple tip on how to do this

pull up the weapon (start to scope) and as soon as you see the cross hairs, fire keep doing this at a wall from about 40 feet bk (just for practice) try and get them as close as possible as soon as you get that you know ho to quick scope however that is not even close to how quick scoping works when going against someone else, this is because your not as patient, and you get a bit more nervous.

a few tips to make you better

1. you will need a red sharpie, and a piece of scotch tape
go to a private game just by yourself and find the  VERY CENTER of where your scope starts out now place the tape DIRECTLY IN THE CENTER then use the sharpie and make it act as where the the crosshairs are and make a little red dot, just big enough for you to see while playing now it acts as a red dot sight without having to waste a weapon enhancement. (since you will need FMJ as your your weapon perk, or acog sight depending on what you want to use)

2. you will need skill,
this is not a proven fact it is just something that i personally use, its called a drop shot i think, its where you see someone and you know they see you, so in order to mess them up you go prone while you are starting to scope, this makes them feel like they cannot hit you, or they will start to hipfire this gives you a bit more time to get a good shot in
also just a side note to this try not going prone so it confuses people, or jumping ( this will confuse and make people mad)