Hello, new to the MGS series, first time playing. I'm playing with Logitech F310 controller. I am carrying a handgun at the beginning of game, just found ammunation and when I open equipment screen, I pick binoculars and can't go back to previous screen to use it, what's the button to use the equipment we picked? I am switching with equipment and weapon screens with LT-RT and LB-RB buttons looks like they are useless.