Lately I've been working on a couple different A1 detachable rear sight/rail designs. You can check out the details on my website...
Below is a pic of what they look like....
I surfed your site and looks great. Do you sell 80% lower ar's?
I don't currently sell my billet 80% AR lowers, but I do have a source for forged 80% lowers and I will be listing those on my website in about a week.