No. No, no, no, no. Because once your in SI again you have no need of guns. Because your the madgod, you can make people INSANE. Why would you want guns? If you agreed to a contract to not give mortals such things then why bother giving it to them when in your realm? Why would you care? Also most of the daedric weapons are simply symbolic, given to champions when they do something for a Prince, and being symbolic, don't you agree that a sword or staff would look cooler than a AK47?
...Then why did you even bring up the idea that daedra are secretly hording guns in the first place? And like I said, if they had secret stashes of guns somewhere, that would have been revealed to you in SI
Spoiler once you became the madgod, since you are now the new daedric prince of madness.
. And if they did have guns, why don't the guards have them in SI or any of the daedra there in fact? The guardian could also have had a gun arm instead of a giant blade, since that dunmer was one of Sheo's most liked scientific mortals in SI. In addition, if the daedra had such technology, MD surely would have used them (assuming they're better than a flintlock rifle) when his daedra minions were pouring out, especially also in Battlespire. Personally, I like guns more than medieval weapons, but this has nothing to do with TES.
Your reason of why my idea is wrong doesn't make sense.
No, it makes perfect sense, since SI is a daedric realm, filled with daedra, doing daedric things,
Spoiler and not to mention you become the daedric prince of madness, the ruler and controller of SI since the realm is now you (the prince=their realm)
Also the Dwemer did make some things like guns if I am not mistaken.
They made steam powered dart guns, that cannot work without a full robot's ability to create said steam. Not to mention no one really knows how to construct such a machine, and can only repair existing ones at best. So no, you can't walk around with the arm of the archer centurion and expect to make any use of it, because it can't work without the robot to produce steam, whom only Sotha Sil seemed to have been the closest person to reach that point, but is dead and secluded himself from everyone and never revealed his secrets to anyone, even his best friend Dyviath Fyr. Even the best minds of dwemer studies still cannot reproduce what the dwemer have done, not to mention are able to translate all text.