That is correct.If you're getting a Dlask quad rail the bottom rail has a hole and an extra screw for the barrel support block.
That would be NOT recommended.You can also put the sling stud back on instead of using the screw if you want.
The hole in the bottom rail is a countersunk hole,
and it would fit the screw supplied by Dlask,
but it will NOT fit the stud found on the OEM Ruger handguard.


















































