Fortis Manufacturing's RAP (Rail Attachment Point) AR-15 Picatinny Rail Attachment Quick Detach Swivel Socket is typical of Fortis equipment and accessories as a durable military grade accessory that looks great and functions flawlessly! This is a fantastic accessory for the military and law enforcement professionals"" but it's absolutely essential for the competitive shooter! It mounts to your forward picatinny rail giving you a Quick Detach socket that occupies a minimum of space on your lower rail. Improve your speed and your accuracy. Put more shots on target further down range. Bring the FMI RAP to your next competition!