A "KeyMod rig rail" is a type of rail system used to mount accessories such as accessories on firearms, shotguns, or other platforms. The KeyMod is a standardized rail system developed by VLTOR Weapons Systems and Noveske Rifleworks by offering a new way to mount accessories.
In the KeyMod system, holes are made for the basic accessories that have a special design, and these holes fit into the KeyMod rail system. This allows accessories to be easily fitted and secured to the rail system with a simple spanner, without the need for traditional mounting rails or screws.
The advantage of the KeyMod rail system is its simplicity and low weight, as there is no need to use a lot of heavy metal structures to attach accessories. Thanks to this system, users can easily customize their gun or other devices with various accessories such as grips, lights, etc. The KeyMod system is popular with AR-15 style guns and other modern weapons.