The Glock 25 is a model of handgun that is not available for purchase by the average American citizen due to importation restrictions set by the Gun Control Act of 1968. This act, implemented by the Bureau of Alcohol, Tobacco, and Firearms (BATF), uses a point system to determine the importation of handguns based on various factors such as length, weight, caliber, and construction. The Glock 25 falls short of the required points for importation because it was designed for use by civilians in South America, where it is legal to use a .380 caliber bullet, but not legal to import military caliber weapons. As a result, it is illegal to import the Glock 25 into the United States. However, it is not illegal to own or possess a Glock 25 in the United States, as long as the individual is legally allowed to own a firearm and follows all relevant laws and regulations. If you want to purchase a Glock 25, you can try to find one that has already been imported or has undergone factory modifications, or you can consider purchasing a similar model such as the Glock 26, which meets the importation criteria. It is also possible to find a used Glock 25, as they are occasionally available through military and law enforcement agencies.