I have another question. In the Firing Squad, an electronic firing system is mentioned for some weapons. However, this modification is not described anywhere. So what exactly does in 6E do?
EDIT: I found on the internet what it did in 5E, but what does it do in 6E? What are the statistics?
I want to say that anything that could potentially have a wireless bonus has one of these. I think this is more for flavor in 6e. It's not referring to smartguns, since it talks about both electronic firing and smartguns.
In the description for the Colt Government 2076/Manhunter:
The years of technomancer and hacker fear since the ’60s have left the electronic firing 2066 in a lot of
storage cabinets for fear of hacking. The 2076 takes a jump back to the style of the classic Manhunter (in fact, the model with an integrated smartgun system has that denotation) and comes with an integral laser sight.
I haven't played 5e for awhile and didn't really play it much when I did, so it's possible that the "intent" for electronic firing systems is different than just flavor. If so, they didn't include the rules for it.
Gameplay-wise, I would say only be concerned with whether wireless is on/off with regards to hacking. If you wanted to, you could say that repairing weapons with electronic systems require an electronics roll instead of engineering, but that's going into GM-fiat territory.