As someone who has put 65 hours into the game, I have noticed there are a number of guns which require some balancing changes. I'm not going to go into the snipers as everyone knows they are a mess. I also don't care about the LMGs and SMGs.
ARs requiring buff:
AK-12: This gun is essentially just a weaker version of the AK-47 with basically no advantages other than a slightly faster reload.
- A ROF increase should fix this gun
SA58 OSW: This one used to be okay. However, since the chest hit-box size decrease, it has become pretty much worthless. As the gun I have spent nearly all my play time using, I have a pretty good feeling for what changes could be made.
- Mag size increase. The SA58, when compared to the AK-47, only has an advantage in its ability to 3-shot to the chest. This advantage is basically negated by the smaller chest hitbox. However, it also only carries a 2/3 of the AK's ammo making it rather difficult to finish off more than one enemy. The final damage after range falloff is quite good but the horizontal recoil even with a muzzle brake makes it hard to take advantage of. Because it has so much horizontal recoil and obstructive irons, an optic and muzzle brake are essential, leaving no room for an extended mag anyway. Upping the base capacity to 25/75 (or 30/90 for realism as no 25 round FAL mags exist) would make this gun much more playable.
M39 & HK417: Making these guns automatic (not having to click for every shot) would make it easier for some people to use and make them more accessible to more players while not actually changing stats.
AUG A3: This one is okay but could use a slight ROF increase to make it more useful against the likes of the AK-47 or M4 ACC-M. At the original time of writing this post, I had not seen or heard much about the AUG. Since then, it has become quite clear to me that it is actually a very good AR.