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.
foregrip only
red dot sight
The Aug scope is the best attachment for the Galil.
extended mags or akimbo attachments is the best attachments for me but everyone has there own play style so try them all.
use the attachment akimbo
no but u can put them on ur guns for custom classes
The tactical knife is a knife attachment that you can use to knife twice as fast.
It depends on your playstyle. If you're after firepower you want FMJ. If you're a camping bastard try the grenade launcher, and if you're sneaky you want a silencer. Try using the bling perk to experiment with combinations.
you unlock that when you have unlocked every attachment and every camo for every gun in mw2
MW2!
none of them.
The best in mw2 gliding is no doubt is SuPra Panther and SoaR Tofu. There both on ps3. The best gliders ive ever met.