It is always recommended to have a stock FXZ file stored on your PC just incase something goes wrong when modifying a Motorola device. It is a safety net, an easy way to get back to a working state if you ever mess anything up. @MattLGroff the creator of the BataKang Rom and the Universal Unroot App has updated his RAZR M Utility with the latest 4.1.2 FXZ. You can now flash roms, and mod your device to your hearts content knowing that you will always be able to quickly and easily restore your device if something goes wrong.
Other than the awesome 4.1.2 FXZ feature the utility includes other necessities like Stock Recovery Flash, TWRP recovery flash, CWM Recovery Flash, MotoChopper Root Exploit, Bootloader Unlock. Basically this utility includes everything you need in one nice easy to use package! Grab this now from the source link below. You never know when it may come in handy!