ADM AD-Recon 30mm 0-MOA
Used, very good to excellent - has some thread locker residue, I can remove it, or let you if you want to yourself... for whatever reason. Has some Silver Sharpie at the rear, which as well, I can remove or leave on.
$100 Shipped PayPal F&F
Email please. Pics will show a standard mount, nothing special, but I can send photos on request.