Doug,
I've shot Truglo's Magnum Gobble Dot Tri Dot sight system for the last 3 years!Before that I had been shooting thier Mag Glo-Dot sight.Both models come with double stick adhesive tape and snap onto your vent rib!With this model I've never had it come loose from muzzle blast or wet weather.I like the tri dot system somewhat better because having the back v-sight not only centers the shot by lining up the front sight but helps in keeping my cheek on my stock when pulling the trigger!Bob

Monarch isn't a butterfly it's the King of the Spring!