@Wisemarko is an ACOG cheaper than an LPVO or is it the other way around?
LVPO come in a very wide price range. There are some high-end only (doesnโt necessarily mean better) optic makers such as Trijicon (their Credo line is really good). But many manufacturers make a range of LVPO such as Primary Arms, Burris, Vortex.
Most law enforcement and militaries buy only the expensive brands mainly because they get good discounts, their budgets are big and usually have a history with using a particular brand.
That does not mean that a $400 LVPO is bad or will not do the job. Almost all LVPO in $400-500 range are weatherproof, shock proof and hold a zero with excellent clarity and field of view even after heavy use.
ACOG has a fixed magnification and itโs own advantage for that but for AR-10 that is not enough.