Neo Rifle is underrated. It's a very good gun below 10k. It only costs $5400 and does 10 damage when upgraded. This can be one of your earliest 10 damage weapons. It has low freeze rate, and good fire rate as well. In exchange, it only has 2 shots per clip. Neo Rifle takes awhile to master, but soon enough, it becomes very deadly when used correctly.
Neo Rifle is used very differently from the other weapons. If you prefer the "standard" way of sparring, Neo Rifle isn't the weapon for you. As it lacks the ability to box in enemies.