Mine got hung up in the Gboro . hell for 12 days just got it Friday. It was junk. Ordered the longer one and got it Sunday. Don’t think I am going to like it as it makes you raise your cheek way off the stock to line up with the dot. Probably going to order a base from Sumtoy for a mossberg that bolts directly to a FF III and just drill and tap the receiver.So I got the longer 46 mm version of your adapter. Thinking of running this set up.View attachment 58295