I recently purchased a Burris Fastfire III to use on a Ruger 22/45 with a suppressor. I couldn't be happier. The optic is very clear and the dot is east to see. The Fastfire has an automatic brightness setting, which is pretty handy to use. I've fired a few hundred rounds through the gun and it's stayed zeroed in very well. The dot makes it far easier to shoot with a suppressor on the gun. Instead of using a rail on top of the gun, I purchased a mount from Burris that replaces the rear sight on the 22/45. This allows for the red dot to not only be mounted further back on the gun, but also much lower. I really like this combo.
Please excuse the pictures of the dirty gun and this brief review. It was posted from my iPad, so it's hard to type. If anyone has questions about the Fastfire on a Ruger, feel free to ask. I also installed a Majestic Arms speed strip kit that improves the trigger, allows the gun to be disassembled with an allen wrench, and removes the magazine disconnect.
Link to the speed strip kit: Speed Strip Kit
Link to the mount: Amazon.com : Burris Fastfire Mount fits Rugger Mark I, II and III : Hunting Trophy Mounts : Sports & Outdoors
Link to Fastfire: Burris® FastFire? III Red Dot Reflex Sight FREE SHIPPING Burris Red Dot Sights
Please excuse the pictures of the dirty gun and this brief review. It was posted from my iPad, so it's hard to type. If anyone has questions about the Fastfire on a Ruger, feel free to ask. I also installed a Majestic Arms speed strip kit that improves the trigger, allows the gun to be disassembled with an allen wrench, and removes the magazine disconnect.
Link to the speed strip kit: Speed Strip Kit
Link to the mount: Amazon.com : Burris Fastfire Mount fits Rugger Mark I, II and III : Hunting Trophy Mounts : Sports & Outdoors
Link to Fastfire: Burris® FastFire? III Red Dot Reflex Sight FREE SHIPPING Burris Red Dot Sights