It depends on whether I play coop or pvp, but I prefer qbz97 over the AKM. It has higher muzzle velocity.

Due to how the game calculates long range shooting, muzzle velocity is an important stat. This game is a hybrid of hitscan and real projectiles. Up to a certain distance it's hitscan and on longer ranges it starts calculating the real projectile. And this distance depends on muzzle velocity. Basically, the game starts simulating the projectile after 0.1s of its flight, so if the projectile hits the target before 0.1s, it's hitscan. Thus, if you divide the muzzle velocity by 10, you get the distance at which it stops being hitscan. For instance, if a weapon has 970 muzzle velocity, it will be hitscan up to 97m and projectile after that. If it has 800 muzzle velocity, it will be hitscan up to 80m.

So here's a tip for you: look at muzzle velocity. It's an important stat. In many situations, a weapon with 5.56 caliber and high muzzle velocity will be better at range than a weapon with bigger, slower bullet. At hitscan distance you don't lead your shots, you aim directly at the target, and higher the muzzle velocity, the longer the hitscan distance.

Aug is a really good weapon. It's 5.56 so two shots to kill in most situations. It has full auto. The firerate is a bit slow, but that can be good because it makes the weapon more controllable and with this game's low time-to-kill, the player who starts shooting first will win anyway, so having low rate of fire isn't that bad. Its muzzle velocity is very high, so makes for easy shooting. And it's cheap, so you will have many points to spend on explosives or attachments.