The crew at MARSEC4 published a great article called “Running Wet Guns.” The article covers getting wet with your guns. The video showing an AR-15 blowing up when fired after it was submersed is particularly educational.
For the average street cop, firearms are typically exposed to water from rain. At the very least, this can cause corrosion. Should an officer drop a gun into a mud puddle, a significant amount of water could fill the barrel and chamber.
Many officers are exposed to water sprayed while working as a marine unit on the many waterways around the world. In these environments, it becomes increasingly more likely that a weapon will be immersed.
Don’t forget our SWAT officers who may have to make a waterborne approach, or just wade through a creek or ditch to get into position. These guys have an increased chance of getting their guns wet.
Check out the MARSEC4 article for more information. Those guys are putting out some really good information.