I have an M&P 15-22 Sport MOE SL since a long time but i would like start and try ipsc (uspsa) mini-rifle (rimfire rifle) and I thought about adding a foregrip, a red dot (maybe a x3 on the top and a red dot on the right side ?) , changing the stock and the trigger.
What do you recommend as mods?

I would love to hear your opinion and sorry if my english is bad.

My 15-22 is stock except for a midrange red dot sight. So are most of the 15-22’s I see at mini rifle events here.

Ruger 10-22’s still outnumber the S&W Here, although that is changing, with other AR style rim fires also showing up on the line.

My advice, put on a red dot and show up for a few matches. Talk to the other shooters about what mods they have made and watch where they place in the match. Sometimes shooters try to buy advancement in the sport by shelling out $’s on the firearm instead of practicing and getting better.

Find out what mods are really working on the line then decide what to do.

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View from down under

I see exactly what you mean, I will try this.
I would ask my shooting colleagues directly for advice during the next training session
Thanks