easy all u gotta do is play a 3rd person mode get a sniper with acog scope
20 kills with an ACOG scope on your gun
u cant
The closest you can get to having an unscoped m21 is using an ACOG scope on it.
I'm sorry to say this but it actually depends what you are going to do with is if you want to be stealthy- Silencer Heartbeat censor if you want to be a hardcore killer- FMJ (Any scope except ACOG scope) if you want to be a sniper- FMJ Thermal scope ACOG scope that's all i can say for now but it does seriously depend on what you're gonna use it for and how good you are at handling the gun.
It all depends on how you play. If you hard scope, it is probably the Barrett 50 cal, however if you quick scope and drag scope it is the Intervention. if u do both its the WA2000 but its kinda nooby...
Walk around with a sniper a just shoot. (Hip fire)
Get 50 one-shot kills with a sniper rifle.
bling pro and scavenger pro are pretty even but i like bling more.... acog scope and rapid fire
This is subjected to opinion but they most used sniper rifles are the Barret 50. Cal and the Intervention. The Intervention is the more commonly used of the two so it is considered the best sniper rifle.
If you are no scoped in MW2 in means that The sniper hit you with out looking down the scope.
The best way is to shoot it repetitively with a semi- Automatic Sniper Rifle (Barret 50. Cal or a WA2000.)