Pulse Rifle is an Experimental Weapon.
Pulse Rifle fires shots with chance to freeze enemies. It has slower fire rate, but also longer range than most of other Experimentals. It's weakness is impact, as it's below average for an Experimental. Its custom version is called the Futurama.
It is redommended to use this weapon with Sniper class as it has longer range, but the range is still not very good and later, Rail Gun will be better for both classes due to it's longest range and heavier impact.
This weapon is like an Elemental, so shooting below yourself can damage you and take your life. However you can't kill your squadmates with it.