MASTER QUICK CONTROL disables THE ENTIRE PACK, except for Hair Triggers. You should disable it while accessing your console's store, settings, and the in-game menu.
WHILE HOLDING TOUCHPAD / VIEW, HOLD OR UNTIL YOU FEEL A RUMBLE. Switch back to the appropriate profile for your current weapon when you want to reactivate your MODS. See the WEAPON PROFILES section for more for information.
OR 
UNTIL YOU FEEL A RUMBLE. Switch back to the appropriate profile for your current weapon when you want to reactivate your MODS. See the WEAPON PROFILES