. Air Arms replacement piston seal Fits TX200 and Pro Sport spring-piston air rifles Piston seals sometimes need to be replaced due to abuse or just normal wear-and-tear.Always use the replacement seal from the original manufacturer to ensure your gun meets the original specifications.
The minute vibrations, both felt and unfelt, can work against the screws and cause them to loosen a little bit each time you shoot.Screws can loosen and even fall out of guns due to extreme changes in temperature and humidity and general use.