For its price its good. It's 6 dmg, 7 with commando. The gun also cannot be deflected by sabers so it a good one against saber users. Only problem is that the gun is a tap-fire only gun. It's not auto. But I like it and recommend it.
Have to tap to fire each bullet individually, there are better guns for similar prices (green/red rifle, for example). However, the sunscreen gun is a limited-time item and will rise in value once it's gone.