Here's a pretty good overview/AAR of the GreenOps LPVO course from Magpul, to include a good video:
comms.magpul.com
Behind the LPVO with Magpul
The Low Power Variable Optic (LPVO) is a popular choice for outfitting an AR-15 pattern rifle with a “do-it-all” optic. The ability to operate your firearm
comms.magpul.com