If your firearm budget is on the smallish side like mine, then you might find my setup interesting (prices are approximate - if you are interested, I can try to get exact model numbers):
BUIS: YHM flip up (no elevation adjustment) ($80)
Raised optic mount (for co-witness): Weaver ($40)
Reddot sight: Konus ($70)
bottom rail for foregrip mount - some Israeli tactical company ($15)
Foregrip: Weaver ($40)
Collapsible stock: Bravo Company Manufacturing ($100)
This setup works well enough for me. Obviously it isn't the extreme setup, but is good for range shooting (so far).