My Sport II is less than a month old and I already have three sight options with a fourth on the way. Personally, I'd cheap-out on the red dot and go with glass optics. You'll have more fun cutting the bulls eye out of targets at the range with glass. If you feel you must have a red dot for HD, put it on when you get back home but for my HD uses, I have a laser. I just don't feel you'll have the time to acquire a site picture you expect with a red dot. And with a laser, all you have to do is point.
I pulled the rear site off my Sport. Here's the list of my sites.
1. Compact red laser with remote. It stays mounted with the remote on the hand grip. It's zeroed for 50'.
2. ATN X-Sight II 5-20 w/QD. For hogs and coyotes at night.
3. Nikon P223 3-9x40 w/QD. For hunting and plinking.
4. Pinty 4-pattern red/green reticle (1-8 MOA) w/QD. Because somebody says you need a red dot for an AR.
