Picatinny rails are standardized mounting platforms used on firearms and other equipment to attach accessories like scopes, lights, and grips. They feature a series of slots and grooves that allow for easy attachment and adjustment of various accessories, ensuring a secure fit. Originally developed by the Picatinny Arsenal in New Jersey, these rails have become a popular choice among military, law enforcement, and civilian shooters. Their design allows for flexibility and customization, enabling users to configure their firearms according to specific needs and preferences.