Mepro m21 amber triangle - Meprolight M21 Self-Powered Day & Night Reflex Sight w/ Dust Covers

I got this optic at a great price. I haven't had a chance to use it yet but its built tough and looks good on an AR. I think the triangle reticle is your best option for longer range work as the top tip of the triangle can be used as your zero. I would certainly recommend the polarizing kit because the reticle does washout when viewed from a dim lit area into a brighter one. I would have given it 5 stars if not for that, but you should expect reticle washout from an optic that does not use batteries. Overall, it's a good choice for an AR optic.