It's a fantasy role-playing game.

DM: You are Percival de Rolo, a human gunslinger . You are the member of the famous group of adventurers. Previously, The archers being restricted by Keyleth, realizing the source of the spell that is holding Kevdak in place, take aim and fire at Scanlan, one of them jumping off the roof to get a clear shot and evading the air elemental's attack of opportunity. Three out of four arrows manage to hit the bard despite one of the archer's aim being disrupted.
DM: This one over here didn't notice you swing by over the top, swoosh overhead. It does see Percy on the roof that shot it, you do have partial cover, so. We'll say that's half cover, so plus two to your AC against this guy's two arrow shots against you. All righty. That is 26 to hit.
Player: Well, that hits.
DM: All right. Second strike. Same thing, 26.
Player: All right.
DM: 18 and 18.
Player: 18 and 18? I can use the-- yeah, I only have one reaction, so. All right.
DM: So that's nine points of piercing damage with the first shot.
Player: I'll take that.
DM: And 14 points of piercing damage with the second one.
