i think the m27 for assault rifles the pdw57 for submachineguns lsat for lmgs and dsr 50 for snipers hope this help if u have these
The best gun is whichever gun is being used by the guy on the right side of the lag comp
I prefer the MSMC right now but I change my mind a lot.
Only had the game 2 wks and the PDW is best SMG IMO though the MSMC is very close. I'm still experimenting with set ups, in previous COD I've usually used the ACR or SCAR as i'm not good at run around however MW3 run around was how to survive and reluctantly I've improved. As stated before it all depends on your style of play or the tactics needed for each game mode but overall the M27 with folding stock and grip backed by the brutal B23R pistol is what I'm running with at the moment successfully its not an aggresive set up but if you leave enough distance between you and the enemy you soon rake up the kills and get the scorestreaks away.
I found that the best guns are found in the single player campaign. It's ashame they did not carry over some of these awesome guns. The programed code is already there it would be a cut and paste job for the most part.
Can't say 'best'. My FAVORITE is the HAMR.
Primary Gunfighter with attachments:
Quickdraw (necessary as the ADS speed is horrible)
Silencer (keep you off the map)
Laser Sight (for close quarters combat)
The HAMR has a large ammo capacity (75 rounds), very little recoil, great iron sights, and a solid fire rate.
Quickdraw is an absolute necessity and the HAMR is below average until you get it, but once you do it's an amazing gun.
MP7 with laser and reflex. When you play in hardcore even MP7 can turn to an Assault Rifle. That's why you'll need a reflex. And laser tightens the crosshair,so you can kill people by firing from the hip. Plus that,MP7 is a powerful weapon along with a big clipsize.
I use this gun all the time.