1. Scar-H - It's accurate. Kills with a a few too many bullets although this can be fixed with the addition of Stopping Power. I also find that it has a few too little bullets in each clip but this can easily be sorted with Scavenger as collectable ammo is kinda helpful for when you want to camp
2. AK-47 - I find this gun is very powerful but I didn't enjoy using it very much. I felt that the iron sights looked very ugly, and it has way too much recoil compared to the AK in Call of Duty 4. On a more positive note it has plenty of ammo and clip size.
3. TAR-21 - I don't know why, but I have never been too fond of this gun. The iron sights look disgusting in my opinion, although the recoil is pretty minimal. There is plenty of ammo in each clip, and scavenger is good for those long camping sessions. But overall I don't like this gun very much, I never got used to using it, and I don't think I ever will to be honest.
tar has a better rate of fire, but it depends on how you playThe Ak is obviously better than every gun you have listed. My fist reason is that it has a larger clip size than the Scar, but does more recoil. It has the same mag sie as the Tar but is more powerful making the AK better than the listed guns.
Steady Aim doesn't reduce RecoilTAR21 is beastt i was using it last night and was ripping thru everythingg, i dont see recoil on it prolly cusz i was using steady aim pro. ak47 is beast also but alotta recoil but silencer minimizes it. and the scar is a good one too but the ammo is really low.