This is a rather irksome issue that needs to be addressed ASAP. When playing the console versions or with a gamepad on the PC version, you cannot switch directly to your secondary weapon from your sidearm. Currently, when you have your sidearm equipped, you're forced to switch to your primary first, then you can switch to your secondary instead of being able to switch directly from your sidearm to your secondary weapon by double tapping the appropriate button (Y for Xbox One; Triangle for PlayStation 4). Please fix this problem as soon as possible, Ubisoft.