New Yorker story with echoes of Hemingway and others

Story in this week's New Yorker, A Brief Encounter with the Enemy, by Said Sayrafezideh (I know I've misspelled his last name - hope I'm close) is a surprise: first of all, be honest, didn't you think this would be a story by a Pakistani or an Arab from the Mideast? And in fact it turns out to be, or at least seems to be, by a young American writer telling a war story: about a mid-20s man who enlists in part to impress girls and because his office-clerk career is going nowhere, finds himself in an unnamed country pretty far from the battlefields (maybe it's Afghanistan, but SS's point is it could be any land at war), where his brigade works for about a year building a bridge to get to a mountain that's supposed to be a redoubt of the enemy, but when they get to the mountain - they don't find anyone. The soldier climbs the mountain on patrol on the day before they're to be flown home and he's shocked to see a man with what he thinks is a goat or a sheep crossing a field. With his very high-tech and sci-fi like weapon (is story set in future?) he shoots the man and his son, from a great distance (the gun doesn't even have to be aimed - it does its job almost robotically) - some very weird scenes in this story, the soldiers waving to a passing fleet of planes and learning later that they're drones, for example - and it will remind us at its best of Hemingway, the start simple language to describe the most horrendous of events - and of O'Brien, the daily tedium and sudden rush of life at war. A very well-told, simple story with both humor and darkness - and a new writer on the scene worth watching.