The Packing Rat has reviewed the Burris FastFire II red dot sight …

The RD is small and light weight – it’s likely you wouldn’t notice the difference on Ruger Mark III 22/45. According to the project description, Burris states that the unit is waterproof. The manual instead states, “Although not completely waterproof, the FastFire is water-resistant and is usable even when exposed to moisture.”