Hey everyone, I have a gen 4 Glock 19. Got it back in 2016 and wanted an MOS but they were all sold out at the time and instead of being patient I picked up the one I have. I'm not upset with the purchase at all. I love the gun and I carry it every single day, but I am wanting to get a RDS mounted on it. I want to keep my iron sights for alignment and obviously a backup if the sight goes down so one of those adapters that goes in the dove tail rear sight is out of the question. So, I'm just wondering what you guys think. Buy a new slide that is already cut for a red dot, or send mine out to be custom milled? All I really want are front slide serrations and an optic cut. Also not wanting to spend more money than what I could pick up a new gen 5 mos for. Any input is welcomed. Thanks.