READ THIS FIRST!!!
Just a heads up, Xbox 360 controllers do not work with the Blu Pure XL. This is because the Vendor .kcm file for Xbox 360 controllers is not included on the Pure XL. You can try adding this file to your Pure XL but this will require root, but it does not seem to work either. I do not recommend buying this particular controller mount.
THIS IS NOT UTORCASE'S FAULT, THE DESIGNER DOES NOT HAVE EVER PHONE IN EXISTENCE AND MAKES THESE BY USING THE MANUFACTURES DESIGN SPECS. There is nothing wrong with the mount itself, it is a great part and holds the Pure XL very securely.
Instead, If you have a rooted Pure XL, buy UtorCase's PS3 mount. There are some apps on Google Play that will allow you to pair PS3 controllers to the Pure XL. if you need to root your Pure XL, use this guide: http://forum.xda-developers.com/pure-xl/general/twrp-recovery-root-blu-pure-xl-allview-t3269447 .