In order to get your accuracy down is pretty simple if you are good with polishing things. I was constant MOA with iron sights with a 583 series. Here is what I did all by my lonesome to achieve it:
1. replace the .100 gas block bushing to a .050;
2. 1911 bushing front and back of the op rod;
3. Polished the trigger parts;
4. Thinned the front blade sight from 085 to .050; and
5. added a Ultimak scope rail to the top.
There is a video made by gundoc where he shows how to do a trgger job as well, PM me and I will send you the link, its not hard to do.
Many will say you will need a strut but since its a 58X series you will not and will only see a small improvement.
For general info, everything before the 58x series with the pencil barrel sucked, the taper barrel is where things got better.
edit, watch the weight of your bullets as well.