Spuhr SP4002 0MOA, 34mm scope mount. $350 shipped. In great condition, but was used. Comes with a bunch of extra Spuhr screws too.
This is one of the taller ones to clear handguards, etc. Specs are here - https://spuhrwebshop.com/en/isms/sp/34/0-mil/sp-4002.html
This is one of the taller ones to clear handguards, etc. Specs are here - https://spuhrwebshop.com/en/isms/sp/34/0-mil/sp-4002.html