Ball-Detection Eyes

Ball-detection eyes are a core component of modern electronic marker systems. Located on the internal walls of the breech, they use infrared or optical beams to determine when a paintball is entirely seated in the firing chamber. When the marker’s board receives confirmation that a ball is present, it allows the bolt to cycle.

The most common design is the break-beam system, where a beam crosses the breech from one side to the other. If the beam is interrupted, the marker identifies that a ball has dropped into position. If the beam remains unbroken, the system withholds firing to avoid chopping a partially loaded ball.

Older or budget designs sometimes use reflective eyes, which detect changes in light reflected off the paintball surface.

Eyes dramatically reduce chop-related failures, allowing markers to shoot at high rates of fire while maintaining reliability. However, they require maintenance paint, dirt, or shell debris can block sensors, causing false readings. Players must clean eyes carefully to avoid damage.

If eye systems malfunction, most boards include an 'eyes-off' mode for emergency play, though firing without active eye protection increases chop risk.