I couldn`t find much on the ROP sizing so I sent an email to Seizmik and they replied quickly that they had not yet done fitment to the Fugleman but thought the Ranger pro fit mounts looked like they may work. Went to my dealer and they agreed to do a quick check. The Seizmik pro fit mounts fit perfectly! The shape of the mount matched with no gaps between the ROP and the mount.. They felt solid in the hand,and appeared to be of excellent quality. I ordered a pair of Embark with the green bezel, should be in next week, hoping the green is a match.