Presma Lightweight Aluminum Hand Stop for M-LOK Slots Black. Extended front wedge acts as an angle grip and the curved back strap is designed for maximum comfort when holding the hand stop. The skeleton structure keeps unnecessary ounces off your rifles front end while being slim enough to fit flush on most low profile rail systems. Uses M-LOK locking screws and nuts and is only compatible with M-LOK rail systems. Specifications for Presma Lightweight Aluminum Handstop for M-LOK Slots: Manufacturer: Presma Fabric/Material: 7075-T6 Aluminum Condition: New Mount Type: M-LOK Package Contents: Presma Lightweight Aluminum Handstop for M-LOK Slots Presma HSML01: Lightweight Aluminum Hand Stop for M-LOK Slots Black