I have the Mini 14 tactical model which I have here on the Gallery if you want to see it. I could not tell from your post if your Mini Tactical came from Ruger like that or if it was a conversion (Strikeforce).
Mine came from Ruger with all the rails, etc. I could not find a Flash Supressor for it, however, I found a Muzzle brake that looks nearly the same and seemed to have the same effect.
On my Mini Tactical I have added a RedDot, Front folding handle, Taclight w/laser, and the Muzzle brake. I also picked up a 30rd Magazine in addition to the 20rd that came with it.
I can tell you that it is dead on. I made some adjustments to the RedDot and laser, but other than that, no jams, etc. So to wrap it up, I love my Mini Tactical! I wouldn't trade, sell it, or anything close. I am into Tactical rifles and when I was in the market for a .223 this one struck my eye. I looked it over and made up my mind in minutes that this is the rifle for me. The only thing I run into is many people do not believe it is a Mini-14 when they first see it, which is a small issue to deal with
Congrats on your firearms!
Take Care