Clintpittenger – this is a great logline, well done! Cool gender twist and intriguing hook (assassinate with only one shot).

Also, I don’t know how nitpicky you want to get with definitions, but:

“The main difference between a marksman (or sharpshooter) and a normal sniper is that a marksman is usually considered an organic part of a team of soldiers, whereas regular snipers tend to work alone or with other snipers. In the military, marksmen are sometimes attached to an infantry squad where they take accurate long-range shots at valuable targets as needed, thus extending the reach of the squad.”

So, perhaps “sniper” is the more correct term? The only tweaking I would suggest is a little wordsmithing and word arrangement:

Selected for a top secret military mission, an elite female sniper team is dispatched to the deadly mountains of Afghanistan and has twenty-four hours to assassinate one target… with only one shot.

You can streamline it even more and leave out the first part without losing any impact:

An elite Army Ranger female sniper team is dispatched to the deadly mountains of Afghanistan. Their mission: assassinate their target with only one shot.

Don’t like the double “their” but just brainstorming…

If you’ve already written this script, I’d love to read it: motmata @ gmail.com.

Cheers,
Monique