The Xindi-Reptilian ray gun was a type of hand-held weapon occasionally carried by Xindi-Reptilian officers. They were metallic, iridescent blueish purple and fired yellow streaks of light that damaged and caused death without physically damaging the target, similar to electric shock. Each of the pistols had a white emission tip or node at the front, out of which the energy discharges could be fired.
Xindi-Reptilians who traveled back in time to 2004 Detroit, in an attempt to create a bio-weapon, were equipped with such hand-weapons. Loomis, a resident of that century, later referred to the weapons as "ray guns," upon being arrested by police officers from Detroit Police Department. (ENT: "Carpenter Street")
These firearms were also used by Reptilians aboard the Xindi weapon, shortly before its destruction. (ENT: "Zero Hour")