I don’t look too hard for Ammo but haven’t been impressed by the UMC stuff. I just buy it because it’s usually cheapest. When I get back to the mainland it’ll be easier to feed it straight 124gr like Lawman. Barrels seem to be hit or miss. Everyone is making a Glock barrel nowadays but based off the studies I’ve seen, there are only a few that will outshoot the stock Glock barrel. The KKM didn’t always perform the best, but it was among the best in every test and they have a reputation for great barrels in other platforms so I figured I might as well stick with the RS spec, despite the lead time. I don’t have personal experience with the MOS, but have heard of it loosening over a few hundred rounds. And it cowitnesses weird with the RMR. YMMV, but after almost an entire year of going back and forth with hands on the ATOM slide, my milled ATEi slide, the Venom, Viper, Delta Point Pro, and the RMR, I wish I had just done the RMR and ATEi combo from the start. Even with the capability of the ATOM slide, the true Roland Special has been my favorite. But maybe that will change when if a new wonder dot gets dropped at shot. Who knows.