re: Ruger

All you need is a Primary Arms red dot (SLx Advanced 30mm Red Dot Sight). It's a good red dot for the money, $130. They also sell other brands. The Vortex Optics, Strike Fire II is very good for a $200 red dot. I own both. Don't buy in to the notion that you have to spend $400-600 for an Aimpoint or EOTech. They are great if you have the cash to burn, but not necessary unless you are fighting a war in Afganistan for a couple of years, or putting several thousand rounds downrange each year, or some shite like that. My two cents. Go to primaryarms.com