

Unlike the keyhole shaped KeyMod rail interface, the M-LOK features large rounded square slots which is optimized for both metal and polymer mounting accessories. M-LOK is a modular locking accessory mounting system that allows direct attachment of a mountable accessory to a negative space mounting point. This rail interface is known as the M-LOK. Therefore, the most recent alternative rail interface system was designed as a free licensed platform. The drawbacks are critical because many firearm manufacturers are making polymer parts to attach to the KeyMod interface due to the reduced costs of polymer versus metal, steel, and aluminum. The drawbacks of the invention include poor securement of polymer parts and the wide spacing needed for the KeyMod nut to clear the mount. As with all inventions, drawbacks become apparent as time elapses and hence advancements must be made. This system is now widely used and provides many advantages over the previous mounting system. This rail interface system was developed to provide multiple accessory compatibility without the need for the heavy aforementioned picatinny rail. This invention in its advanced stage of product development is now known as the KeyMod attachment system. proposed a firearm with keyhole-shaped rail mounting points. 8,752,320 B2 Accuracy International of North America, Inc. Therefore, a need existed for a system that would not add weight to the firearm but still provides a secure mounting point for accessories. The configuration of the picatinny rails requires many rails to span along the handguard.

This is detrimental to the user's abilities.

Universal mounts like the MIL-STD picatinny rail mounts provide a firm and secure mounting option for users, but at the expense of increased weight.

This system provides a means of attachment of various mountable accessories such as scopes, sights, grips, and lights. Firearm rail systems are typically integrated into the handguard of the firearm.
