The OKOs are nice, but yes are a bit flimsy, but you can get different version of it now /w a steel shroud, but it puts it up to the EOtech price range(maybe a lil less)
the Kobras are nice, but are a bit on the bigger side.... ATN makes really good red dots that are OKO sized, but are cased in a steel body, and much cheaper, ATN sights are made in Belarus....