The M-LOK system offers a new modular mounting system for accessories developed by MAGPUL. All M-LOK free float forends include a M-LOK accessory rail (with M-LOK nuts), forend adapter, barrel nut, Vibra-Tite, and 6 6-32 screws.

Technical Specs
Free float.
Weight: 8.5 oz
Made from 6005-T651 Aluminum.
Inside diameter: 1.6"
Outside diameter: W-1.8" H-2.1"
Engineered with advanced ergonomics for comfort and improved performance.
Continuous/uninterrupted Picatinny Rail across the top.
Accessory rails can be placed at 3, 6, and 9 o'clock positions and can be joined to create continuous Pic Spec Rail.
QD sling mount positions at 3 and 9 o'clock.
Engineered to allow for low profile gas block to fit inside.
M-LOK is a modular locking accessory mounting system developed by MAGPUL.
Adjusts in 1/2 slot increments for precise accessory placement.
No access to back side of the rail is required.
Accessories can mount with either end facing forward.
Works with both metal and polymer accessories.