I bought a Millet 30mm red dot from a friend a little while back. It works perfectly and is in absolutely mint condition. It is a stainless finish model and retails for around $125. I was considering putting it on my bushmaster but I ended up buying an eotech instead. I don't have rings for it but I do have the stock scope caps (which are pretty cheapo). I'm looking to sell it for $60 and buyer pays shipping. I can send pics if needed. I will try and check back here or you can email me at firstname.lastname@example.org if you have any more questions.