An accessory system for a firearm includes a target sight secured to a mounting rail of the firearm, an accessory secured to the mounting rail of the firearm, a sensor configured to sense a position of the accessory, and a processor configured to receive input from the sensor and adjust an operating mode of the target sight based on the input from the sensor. The sensor may be a magnetic sensor, a proximity sensor, an ambient light sensor, or a switch. Methods are also described.

The disclosure relates to a viewing optic. In one embodiment, the disclosure relates to a viewing optic with an active display and an elevation adder. In one embodiment, the disclosure relates to a viewing optic that has an integrated display system that can incorporate and account for the elevation adders and display the correct drop in the first focal plane of the viewing optic.

An accessory system for a firearm includes a target sight secured to a mounting rail of the firearm, an accessory secured to the mounting rail of the firearm, a sensor configured to sense a position of the accessory, and a processor configured to receive input from the sensor and adjust an operating mode of the target sight based on the input from the sensor. The sensor may be a magnetic sensor, a proximity sensor, an ambient light sensor, or a switch. Methods are also described.

An accessory system for a firearm includes a positionable magnifier, an accessory structured to operate in conjunction with the magnifier, a sensor configured to sense a position of the magnifier, and a processor configured to receive input from the sensor and adjust an operating mode of the accessory based on the input from the sensor. Methods are also described.