I have the Burris FastFire III on a revolver and would not hesitate to use one on a Glock slide mount for hunting or range use if it had BUIS.
The only drawback to me was that it does not come back on when moved or when light hits the sensor, you have to press the button to turn it on. It has a screw on battery cover you access from the top and comes with a cover that you can leave on to shoot, shaped like a little covered bridge that overhangs the front and rear and provides shade to the sight and will keep light snow off of it. It has clear plastic to close off the front and back for more weather protection. Not weather tight, when I mean shelter I mean like a tent, not a submarine.
I spent $250 on it and like it for what it is, but not for a tactical, carry or HD gun due to the auto shut off, manual on mode.
The new Leupold is coming soon and I have seen pics of one with a built in adjustable rear sight so you could just match up the front sight for height and be good to go.
Good luck and have fun, I find that my red dot has really increased my desire to get out and shoot more.