Cool emblem on the gun.
True, there is a slight dissonance regarding the fact that you will have to capture creatures with the help of a "gun". Even in AR, a weapon is a weapon. In the place of creatures, you don't really want to be next to the "healer" who first shoots you...
That is why creatures will be able to escape a battle as well! And firing your laser gun off the bat when they are at max hp will be very ineffective and won't capture it 99 times out of 100. So firing it first won't be what the majority will do unless they really wanna waste ammo. :D
Why a gun and ammo, why not a Zingshooter and Zingballs :D ?
It can be a lot of things in the future. This was chosen for the alpha starter sale but there'll be many variations from engineers and forgers crafting their own, etc.