Gunnery is the 2nd Discipline of 3 available for the Republic Commando. It focuses on dealing direct damage without relying on DoTs much. Most of the hard hitting abilities are channeled, which fits perfectly into the role of the class – stay away from danger, pick a clean and safe spot and don’t move like crazy all the time (which is typical for MDPS, by default). Here is a detailed introduction to 5.0 Gunnery Commando written by Damian, and Mmogah will list them in the following parts.
More information is here: https://www.mmogah.com/news/swtor/swtor-introduction-to-5-0-gunnery-commando