It was NOT engineered for M.O.S optics. That is why it is not an M.O.S. gun...The polymer slide is extremely tough and was engineered for M.O.S. optics. You will have no issues.
You can do whatever your paycheck will allow.I’m also a Factory Certified Glock Armorer, and I know several people that have had the slides cut for MOS optics, no problems whatsoever.