Only JLI and Pathfinders. Once the targeted model gets hit AND has less than a certain HP amount (<75% for JLI and 40% for paths), the model gets instantly killed. JLI have one weapon that can do this, paths have 2. The rest of the squad has 'normal' weapons.
Other weapons might share the same visuals and audio, but do not work the same. PTRS can't snipe models, but do a lot of damage IF the PTRS hits. This might lead to the assumption that the PTRS could snipe models, but it does not
Tnx you saved my day
Only one question remain, by pathfinders you mean both pathfinder and I&R pathfinder?