New locking M-lok Quick Detatch 140mm Picatinny Rail. Easily attach any Picatinny Rail mounted accessory (angled fore grips or other items with extended attachment points) anywhere along your M-Lok rail. Press buttons and insert into M-Lok rail slot. Release buttons and press down to firmly seat the mount to the rail. Mount is now firmly attached to the rail. Use as normal (no tools needed!). To release, squeeze buttons and pull away from the rail. 140mm = ~ 5.5" long
 
Allows you to move your attachments to different spots along your rail to help balance the rifle or remove completely. 
 
Must be used on metal M-Lok rail sections between 2 and 3mm (.08-.11") thick. If the rails are too thick or too thin, the mount will not work properly and can be pulled off the rail section.