modern warfare 2 question?

I would go with ACOG scope or extended mags. I dont like the silencer because it reduces the range :p but u have to see what works 4 u.

It depends on what stats you are using. It would be incredibly stupid to have a bling, cold-blooded, and ninja pro setup for say, an ACOG and Ex. Mags. If you like being that guy who sneaks up and flanks the enemy, then going with a silencer and either a close range targeting system, or extended mags would be ideal. If you like bull--rushing the enemy, then extended mags, rapid fire vector, with bling, stopping power/hardline and steady aim would be ideal. It really depends on how you use the gun and what your playstyle is.

Well I prefer Silencer or Red Dot, but the only way to find out which are best for you is to try them all.

Silencer Acog for silnce, or Rapid Fire and FMJ for going loud.