AR15 Safe Space is selling the Holosun HS510C for $224 with free shipping. You just need to add the item to the cart to get the sale price. For some reason, the product page shows the full/regular price. https://ar15safespace.com/shop/holosun-hs510c-circle-dot/ I just bought one for my custom built AR15. I had one on my CZ Scorpion, but let go of it when I sold the Scorpion. Now, I wish I would have just kept it, and sold the Scorpion sans optic. This is my first time buying from AR15 Safe Space. So, caveat emptor.