The Sylvan Arms Quick Detach M-LOK Rail Section is a cut above the rest. An improvement on the standard quick release Picatinny for the AR Picatinny rail mount, it is an innovative QD mounting system paving the way for a more efficient and effective use of MLOK QD adapters on modular weapons. It is specifically designed to make removal and installation of accessories quick, accurate, and easy, avoiding issues such as overtightening. When the M-LOK rail is pressed on the rail section of the firearm, two spring-activated locks retract and lock on securely to the M-LOK slots. It's that simple and easy to attach. The design of the locks keeps your accessories attached to the rail section securely and safely in place. No need for screws or wrenches. Its quick release feature makes detaching also quick and easy. To detach the accessory, simply press the two buttons at each end of the M-LOK to detract the locks and freeing the MLOK Rail. You can actually attach or detach accessories in seconds. It is compatible with any M-LOK accessory such as the M-LOK QD sling mounts and flashlights. Truly revolutionary! Note: Designed for use on the precision machined aluminum rails between .080" to .125" thick.