(08-27-2018, 09:31 AM)TacPaddy Wrote: The [Pen] mod is not available at re-engineering. You would need an Omni that already came with the [Pen] mod, when it was crafted. And to be honest, that would be super rare.
I crafted one after about 20 tries - it is possible but it depends how lucky you are. I would also advise against it unles you have lvl 20 R+D because even then you are not guaranteed to crit it! - Buy it from Exchange!