I had an extra one that moved off a pistol and is now on a Rossi R92 / 357. With the 'middle age eyes' effect going on, the Chevron is far easier to use than the irons and ringing steel at 100-125yds is easy peasy.
You can't change it. Chevron only. No dot. It's 10 moa and you can range off of it.Nice review. I love my 507. I saw the vulcan sight and thought it was a great idea. But didn't know you could change reticle between chevron and dot. Good to know. I prefer red cause I feel the green will wash out with all the flora, especially in the spring with all the bright green colors.