The C31 Wall Mounting Bracket
makes it easy to attach your Genie Mini Client to any flat surface, and of course because of the client's built-in RF technology, you don't have to worry about hiding it behind the TV. Still, there's some confusion because of the name. It's called the C31 Wall Mounting Bracket but it will work perfectly with the C41 Genie Mini Client, too. The two devices are exactly the same size and shape, so the same bracket works with either.
In truth, there was a lot of commentary when the Genie Mini Client was first announced, with folks saying that it should have been built for wall mounting. It took several months for DIRECTV to release the bracket, but they did so by CEDIA 2012. When the next-generation C41W Wireless Genie Mini was released, it had built-in keyhole slots, eliminating the need for an additional bracket.
So, bottom line, the C31 and C41 can use the same bracket, while the C41W doesn't need a bracket.