Are these bumpers illegal?

[philso]

It may be the angle the photo is taken at but it looks like the mechanism at the bottom right corner of the photo may stick out past the inside surface of the bumpers and it does not look like it retracts.

Your frame perimeter should be totally enclosed by the inside faces of the bumpers. Read the Game Manual carefully to understand the requirements for any spacing, support points, gaps in the bumpers etc. Ask questions on this forum if you are still not sure about your interpretation of the bumper rules. You are not alone if you feel confused.