Well, you only have two choices for everything if you just started.
Every machine pistol and handgun can be akimbo. No SMG's or shotguns can be akimbo in MW3.
the best class to use is your favourite smg with silencer and stinger as your secondary and perk 1 sleight of hand perk 2 asassin perk 3 stalker
It all depends on the application to which you intend to put it.
farhaanbossman is the best at mw3
Can't be answered without knowing your intended use.
The best sniper riffle on MW3 is the MSR but some like the ASSO.
mw3 is the best game ever! and will always be!
No
The Crosman Mini Uzi... it has about 500 fps and is the best gun evar
yes
mw3 is awesome very awesome for awesome people and this stupid tf2, the gun suck, everything in tf2 is suckish. play mw3, mw3 is the best and tf2 are for noobs and losers