Actually the word mutant isn't politically correct. Proper title would be genetically created being. Some were introduced to world of Rubi-Ka by the ever evolving corporation Omni-Tek and others were liberated by animal activists (ahem) like Eco Red. But the fact remains, they are all around us. Sometimes a danger, sometimes a nuisance, but always a presence. Among those roaming the plains some, namely Eye Mutants, got their hands on phats. And after a bit of friendly fire they even willing to share them with us. But due to difference in morphology, most of those items need some additional processing for human use.
Here are the items you will find on Eye Mutants (drop rate calculated from 100 kills in Pleasant Meadows and 100 kills in south of Greater Tir County):
So how can a young Engineer get his or her hands on Eyemutant Orb Laser, apart from looting an already build one from the corpse of an Eye Mutant? Crucial ingredient is an Eyemutant Eye. They come in all QL and if you're after higher ones, I would suggest visiting camps in west of Avalon or pulling a mission.