The Raider Outcast is the first mainline sniper unit for the Raiders introduced as part of the 2.1 Patch. In Raider culture, snipers are not respected, as explained by Sarin during a train of missions starting with "Introducing: Sarin". They are actually considered cowardly by the Raiders, thus the name "outcast".
These units only have 1 attack - a sniper shot that deals 63-77 -type damage with a 55% critical hit against soldiers, and a 10% base critical. Similar to the trainable Sniper, it has infinite ammo and a 3-turn cooldown.