Unless you can explain a need to change any of the parts you mentioned on your pistol, leave it alone.
All a 1911 really NEEDS is reliability, good sights and a good trigger. Your RIA Tactical probably has all three and is a good value for the money spent.
Spending money replacing parts that aren't broken, aren't likely to break, and are coverred by a lifetime warranty even if they did is probably not the best course of action.
"You keep using that word. I do not think it means what you think it means."
"What we get away with isn't usually the same as what's good for us"
"An extended slide stop is the second most useless part you can put on a 1911"
"While Ruger DA revolvers may be built like a tank, they have the aesthetics of one also,
although I suppose there are a few tanks which I owe an apology to for that remark"