It depends on what you're good at. Here are some classes that I use:
TAR-21
Stinger
Semtex/Smoke
Scavenger/Stopping Power/Sit Rep
Martyrdom
UMP 45 Silenced
M93 Raffica
Claymore/Stun
Marathon/Cold-Blooded/Ninja
Martyrdom
L86 LSW w/ grip and Hearbeat sensor
AA-12 w/ Red Dot Sight
Semtex/Flash
Bling/Stopping Power/Commando
Martyrdom
Intervention w/ Heartbeat sensor
.44 Magnum Tactical knife
Semtex/Flash
Sleight of Hand/Lightweight/Steady Aim
Martyrdom
Riot Shield
Striker
Frag/Stun
Sleight of Hand/Hardline/Commando
Martyrdom
Note: I don't have Xbox Live, but I have played it before. And I'm only level 36, so these might not be the best
farhaanbossman is the best at 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
The best sniper riffle on MW3 is the MSR but some like the ASSO.
mw3 is the best game ever! and will always be!
mp7 silenced fmgs akimbo and silenced slight of hand assassin pro dead silence pro
find the custom class and unlock them
No
yes
ump45 silenced
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
My best class in mw3 is one of the best classes in mw3. Its really good. I called a M.O.A.B with it. If you want to know my best class, then here it is: M4A1-Suppressed MP9-Akimbo Camo-Red Equipment-Semtex Special Grenade-Flash Grenade x2 Perk 1-Scavenger Pro Perk 2-Assassin Pro Perk 3-Dead Silence Pro Attachment on M4A1-Kick Deathstreak-Juiced I hope you guys enjoyed my class. And I hope you can use it one day. If you do, you will get a M.O.A.B with it. Trust me And if you want my gamertag for xbox its xBatman. And my Playstation3 gamertag is the same as the xbox one
The China Lake is a secondary weapon, and the last weapon unlocked for Create-A-Class, unlocked at Level 48. It is not available in MW3