Save your money, this is all you need. - Vector Optics Frenzy 1x 20x28mm Red Dot Sight

I can't say enough good. Putting a $500 optic on a $500 gun is silly. This is as good as any Doctor/Noblex on the market and the price is great. It sits exactly as an RSO at half the price or less. Customer service has been outstanding even with no issues. Comes with every screw you could possibly need to mount on any gun. Lens is naturally low for co-wittness ease. WIDE open window with beautiful clear dot. I already purchased the RMSc version for my Shield and it is also amazing. What a great dot. This company will be the next swampfox in offering affordable entries with an excellent product. They have my business secured.