Nothing wrong with sticking with the AN-94, it's an amazing gun. And the Uzi seems very good, you think you will move to the PP2000 or no?
No, I will not. I have tried the PP2000 and I just prefer the Uzi. The Uzi does fire slower, but it does do more damage. While the red dot is kind pointless, I really don't like the iron site on the Uzi. Depending on the situation, I will swap it out for more ammo for the Uzi or Explosive upgrade for more missiles.
I honestly think all the guns are good guns. I like that some depend on your play style as a whole or with that kit in particular. As an Engi I tend to be in people's faces at close range so I like the balance of the high fire rate and damage of the Uzi. I want to like the UMP 45, but it is mainly a mid-ranged weapon and I don't play the Engi that way for it to be effective.
There are only three guns I think are a complete waste of time to use.
*The G443 pistol just doesn't fit into any situation, play style, etc. that I can say it is better for than the others. It is just out classed for any situation in this game.
*The default Engi gun has everything in the middle. It has the smallest clip, and medium everything else (compared to other sub machine guns). The other options are just better in any case. The first unlock made the gun useless. The Scar-L does slightly more damage, shoots slightly faster, and is slightly more accurate. even if I am seeing that comparison bar wrong and everything is even, the Scar-L has a 30 round clip give it a 50% increase in clip capacity.
*Finally, the L88 Sniper Rifle (I think that is its name). Obviously I don't use the gun and my reason is simple "SVU". It is the same situation as the Scar-L accept now the SVU has less kick and is near silent. Neither will do serious damage with the first shot or two, but at least with the SVU I will not give away my position quickly and can easily reacquire a target and fire a second and third shot, usually before anyone notices. I use this gun with a 4x scope and do "clean-up" work. Getting rid of the wounded who think they are hiding or fleeing from the situation they just got owned in.