Yes
you have the get the weapon to maximum proficiency.
There is no grip attachment for assault rifles in Modern Warfare 2, the grip attachment can only be found on light machine-guns and shotguns.
F_m_j_
No its not
Yes, with the "BLING" perk.
FMJ,akimbo,and tatical knife
They just haven't put it in
You have to take the akimbo attachment off.
I don't see why not.
It basically does the same thing as a M1014 with less of a fire rate.
Using a grenade launcher attachment or Thumper, make a direct impact kill on an enemy.
No, you must have the attachment already unlocked