With the blast rifle, you will be able to take out an enemy without hitting him directly. If you have someone hiding behind something you can hit nearby, and if they are close enough, they will take damage. Direct hits, if I recall from my testing correctly, will deal enough damage to take out someone (With full 100/100 health) in two hits, and there is no critical hit ability. With the impact grenade and launcher, I might dump the long lasting smoke for them and add a smoke bomb instead.