My current obsession is with cannons. I would have to guess this is from the ferocity of the attacks and speed. The current built is a work in process and needs tons of work to get the XII equipment left up to XV.
to finish the overall gear Artyom needs to be Level V in Discovery Rep. Though he is Level II in Gama Rep, another 400ish Marks to acquire the Ordinance Accelerator.
Updates will be posted as this build progresses.