The Xindi-Reptilian ray gun was a type of hand-held weapon occasionally carried by Xindi-Reptilianofficers. 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.
The name for these weapons comes from Loomis' reference to them. It is possible they are actually Xindi-Reptilian phase-pistol, especially as Loomis refers to a Starfleet-issue phase-pistol which T'Pol brandishes as a "ray gun." The Xindi-Reptilian handguns were made from sturdy molded rubber which was then painted. The white tip at the front of each handgun was acrylic. Two of these props was sold off on the It's A Wrap! sale and auction, both of which came with a holster.  A pair of Reptilian handguns was sold as part of the 40 Years of Star Trek: The Collection auction. Those specific props were estimated to sell for a price between US$200 and US$300 but ended up being bought for US$1,000 (US$1,200 with premium).