A bolt mechanism that is actuated by an electromagnetic arrangement is provided for use within a pneumatic projectile launcher or marker. The electro-magnetic arrangement provides for rapid movement and a high degree of control over the bolt. Generally, an arrangement of electro-magnetic coils is provided that exert a force on ferrous materials or permanent magnets thereby causing the bolt to reciprocate back and forth. Several embodiments are provided that disclose configurations having varied numbers of electromagnetic coils, ferrous materials and permanent magnets strategically placed within the breech and bolt of the marker, wherein energizing the coils produces movement of the bolt. Further, the electro-magnetic bolt system of the present invention is equally applicable to slide bolts as well as rotary bolts.