With the Quick Rail detach system, a simple push and pull of the of the quick detach (QD) latch, you have the handguard off in seconds. Integrated into the front of the GRIDLOK LITE is the built-in flip up backup iron sight. Compatible with the M-LOK system at the 3, 6 and 9 o’clock locations. In the rear of the handguard you will find a integrated 360 degree free swivel QD socket for a 2-point setup. Rear tabs with set screws at the top the SI GRIDLOK LITE help center the top rail to the upper receiver to ensure proper alignment.