I don't know where you live or what your situation is.
But I don't generally carry a spare mag, or a back up gun, let alone two spares AND a backup gun.
This is the same if not more of a load out than the local cops would be carrying... and they actively put themselves in harms way, sounds like your just toting around all that weight.
I am not trying to put anyone down for carrying mags or a BUG, what works for you works for you... I just feel its not justified at all, so I don't do it myself.
That being said I keep an extra gun in my car.
Most SD shootings are less than 3 shots fired... I feel like it is very hard to justify carrying 30+ rounds on ones self PLUS a BUG everyday.
I carry a spare mag with my 1911 once in awhile, but its a 10round extended mag... so that gives me 19 rounds of .45acp on myself, which I feel is more than enough for what I would be encountering. I don't plan on getting in a gun battle with a bad guy.. if I am forced to shoot I will shoot, but only until I can find a means of escape... I do not want to be hanging around returning fire, and doing multiple mag changes.
On the flip side of things I live in the country, where I am lucky the cops would get here in less than 30 minutes... so I keep a few mags for my AR loaded.
As for the tough guy answer of ""Better to be judged by 12 than carried by 6."
I am fairly certain I would rather die than have to live in one of our over populated prisons like a dog... and have a new boyfriend named Bubba, but that is just me.
Watch some SD footage that has been caught on film.. they are not like movie shoot outs people intend to envision, MOST happen very quickly, very few shots fired. Yes some go on longer like the North Hollywood shoot out.. but this is getting back to what others have said.. your not a cop.. you don't have an obligation to hang around and return fire... matter of fact that would probably get you killed or thrown in jail.