All that said, your not going to get anyone that will guarantee (must was your word, potato patato type thing) 1/2 moa. I think you'd be better served with an adjustable two stage trigger. My suggestion is geiselle. Especially for precision work. You have a great barrel picked out. Your stock choice isn't my cup of tea, but it's your build.
My my constructive criticisms are just that nothing more. I don't know you and cannot possibly be butt hurt by words on a screen. Your biggest thing will be you behind the trigger at the distance stated (750 yds) 1 Moa is still tough at that distance regardless, ask me how I know. Good luck with your build and welcome to the site, others will be along shortly to welcome and add advice.