I was just gifted a BSA reflex, the PMRGBS. It has red, blue, and green with four reticle patterns. On the other hand, it's probably.50/50 if the sight will work beyond 500 rounds, there are a lot of reports of losing zero, the gllass getting loose, battery cover flipping off, etc. One major source of the issues is mounting it on a magnum caliber handgun (DUH!) and rifles larger than .308. Nonetheless, there are some using it on magnum rifles with no complaints. Yet.
Seems the guys who buy two fare better, mysteriously, the first seems to fail and the second survives. So much for anecdotal reviews. It's very much a matter of you get what you pay for under $150, and with the challenge of color perception, it's probably better to just save up and get the better optic and be done with it. I bought a first gen Aimpoint in the day, it still runs, testimony to the teeth gritting price that nearly equaled the HK91 I mounted it on. Yes, the HK's were dirt cheap in the day, less than a Rem 700.
I'm going to mount the BSA on a 6.8 AR, we'll see which sight I get, one of the good ones, or a inexpensive lens for the 10-22. Either way, it looks cool thru the lens, and it's the thought that counts.