harpy: i use for 3 cat spam, there have health steal ability, so it pretty cool. you can use it to kill people who have weak armor, and have 2 health after you hit them. this have area damage weapons, fast reloading time. try to aim in head for headshot damage.
you can counter these user by using b-hop or rocket jump and finish them quickly from sky. they can not do anything with this weapons when you using jetpack