Board Thread:General Nerf discussion/@comment-26257480-20171017221351/@comment-27306930-20171021160351

That looks like a pretty standard flywheel cage, Arch. (BTW, not my pic)  I usually have good luck using two flat blade screw drivers, one under each side, and just pry them upward simultaneously. Sometimes it's a little more tricky than others, but it's never failed me.