You roll a -3, which it just one point too low to make a successful hit.
Opps, my bad. You crouched which gives you +1 accuracy. That means you DID actually hit.
You do 2 damage to the serpant guard who suddenly shakes in pain from the blast and looses his turn this round.
Your second zat gun's shot hits him which means that he is KO'd.
Richard raises his P90 and shoots at the Horus guard.
He rolls +3 and hits, and then -3 for a total of 3 damage. The bullets hit the chest piece of the Horus guards armor and the guard only flinches.
Kael and Steve, you're up.