A scope system, comprising: an elongate tube comprising a lumen extending therethrough, the elongate tube further comprising a distal end portion; and at least one accessory channel extending from a proximal end to a distal end and comprising an accessory lumen extending therethrough, the at least one accessory channel movably disposed at least partially within the lumen of the elongate tube, the at least one accessory channel comprising a distal section terminating in a distal viewing end, the at least one accessory channel further comprising a forward-viewing configuration and a side-viewing configuration; wherein the distal viewing end of the at least one accessory channel is rotatably coupled to the distal end portion of the elongate tube; wherein in the forward-viewing configuration, the distal viewing end of the at least one accessory channel is substantially parallel to the distal end portion of the elongate tube; wherein in the side-viewing configuration the distal viewing end of the at least one accessory channel is disposed at an angle to the distal end portion of the elongate tube; characterized by: the scope system further comprises a rail extending from a proximal end to a distal end, wherein the rail is pivotally attached to the at least one accessory channel at a first point; and wherein the at least one accessory channel is longitudinally fixed with respect to the elongate tube at a second point proximal the first point; or wherein the distal end portion of the elongate tube further comprises a slot extending longitudinally along the distal end portion; and the at least one accessory channel is connected to the distal end portion of the elongate tube via a pin slidably disposed within the slot, wherein a pull member extends proximally from the pin; wherein movement of the rail, or application of a proximally directed force to the pull member to slide the pin proximally along the slot, moves the at least one accessory channel from the forward-viewing configuration to the side-viewing configuration. an elongate tube comprising a lumen extending therethrough, the elongate tube further comprising a distal end portion; and at least one accessory channel extending from a proximal end to a distal end and comprising an accessory lumen extending therethrough, the at least one accessory channel movably disposed at least partially within the lumen of the elongate tube, the at least one accessory channel comprising a distal section terminating in a distal viewing end, the at least one accessory channel further comprising a forward-viewing configuration and a side-viewing configuration; wherein the distal viewing end of the at least one accessory channel is rotatably coupled to the distal end portion of the elongate tube; wherein in the forward-viewing configuration, the distal viewing end of the at least one accessory channel is substantially parallel to the distal end portion of the elongate tube; wherein in the side-viewing configuration the distal viewing end of the at least one accessory channel is disposed at an angle to the distal end portion of the elongate tube; characterized by: the scope system further comprises a rail extending from a proximal end to a distal end, wherein the rail is pivotally attached to the at least one accessory channel at a first point; and wherein the at least one accessory channel is longitudinally fixed with respect to the elongate tube at a second point proximal the first point; or wherein the distal end portion of the elongate tube further comprises a slot extending longitudinally along the distal end portion; and the at least one accessory channel is connected to the distal end portion of the elongate tube via a pin slidably disposed within the slot, wherein a pull member extends proximally from the pin; wherein movement of the rail, or application of a proximally directed force to the pull member to slide the pin proximally along the slot, moves the at least one accessory channel from the forward-viewing configuration to the side-viewing configuration. the scope system further comprises a rail extending from a proximal end to a distal end, wherein the rail is pivotally attached to the at least one accessory channel at a first point; and wherein the at least one accessory channel is longitudinally fixed with respect to the elongate tube at a second point proximal the first point; or wherein the distal end portion of the elongate tube further comprises a slot extending longitudinally along the distal end portion; and the at least one accessory channel is connected to the distal end portion of the elongate tube via a pin slidably disposed within the slot, wherein a pull member extends proximally from the pin; wherein movement of the rail, or application of a proximally directed force to the pull member to slide the pin proximally along the slot, moves the at least one accessory channel from the forward-viewing configuration to the side-viewing configuration.