HI new rainmaker owner
1. any but you need to do slight modificatins.
2.Atuococker i usea all- american and a lapco bigshoit, a dye xceel, and a dye boomstick.
3.Any go to the rmog because arter you set up ypuor vetrical asa for better flow you'll want to gut the stock reg.
Others i don't know.
What is a ventuir. Did you Mean A vertuer Bolt?
I hope you get one, they are nice guns.
And if you ever need help where here for ya.
Don't listens to fags who don't know what there talkin about usally they haven't even shot or held one. For ex. If they had they know it wasn't plastic.