Just received these, here are the images and my thoughts at the end.







Yes, these are spring-loaded. However, the spring is pretty soft/flimsy. They should have used a little stronger spring. And, the housing around the BF tube is not snug, so wouldn't recommend making a connection on the housing/ring. You will have to make connection on the BF tube itself. Kinda not habitual of doing that because of the FatDaddy connectors I have been using in the past ..

FatDaddy one ..