Star Wars Battlefront Wiki
This article covers the reboot version of this subject.   This article covers the Original version of this subject.  
Beam Rifle

The Beam Rifle looks just like a normal Sniper Rifle

Marksman is an Award which you earn by getting 6 headshots with a Sniper Rifle. Once you get the award 4 times, every time you get the award again you get the Beam Rifle for a period of time.