My best is the m4al i also picked up a m16 from a body and did pretty sweet with that!

AK47 silencer

ACR Holographic I use this and get all my killstreaks

MMMmmmmm Hard choice Id say Ak-47 Then Fal (im using Rapid fire) Then Scar-H

I actually can't choose between 3 of them so I'll just do that

I like the M16A4 (Holographic and sometimes with Hearbeat Sensor and Silencer) it has a great amount of damage and with the Holographic it shoots amazingly accurate, also with Stopping power and even a Silencer on it at the same time it has a one burst kill over any range.

The ACR is also one of my favorites, it has low damage but having zero recoil makes up for it big time, together with stopping power this is a serious force to be reckoned with.

And last but not least the AK-47, I don't know why but I always play good with this weapon, even thouh it adds a pretty big amount of Sway with any attachment on it. It also deals a whole lot of damage.

Mine was always the Scar with silencer but now its all about the AK47 with silencer it a 3 shot kill with stopping power

acr!!!!