First of all, don't listen to all theses noobs.

If you don't know how to play you should shut your mouth!

1) AK-47 is better without any add on. ACOG with Ak is stupid because you dont put an ACOG on a gun that has so much recoil. Red dot on AK-47 is for weak players, my golden AK is more powerfull with no attachement.

2) The ACOG is really sexy on a M40A3 (aka "the first sniper" for doomies). I got more than 50 000 kills only with this setup (M40A3 + ACOG) and every single kill is impressive (not like all the noobs who spray with smg and steady aim ...). It's really hard to get it at first, but after about 10 000 kills you gonna understand how it works. And btw, this sniper is more powerfull with the ACOG (75 damages instead of 70) and if you choose stoping power (only beginners use something else than stopping power) you will kill in 1 shot even in the legs ( stopping power = +40% damage | 75 x 1.4 =102 instead of 70 x 1.4 = 98 | do I have to say you have 100 health ?)

I only use ACOG on M40 but it can also be good on acurate assault riffle like M4 and M16.

note : like all the real gamers, I play on the PC so it can be different with the auto aim on X360/PS3 ...