When I can't talk a client out of putting the Remington extension on his weapon and there is going to be a Surfire forend on it, I use a bracket that does not have the stud. I then use a Wilson sling plate so he still has a forward mounting option.
If you use any bracket that has a sling mount infront of the light and ever use a sling, the sling is going to be in front of the light and can cause and issue. The studless Remington bracket and Wilson plate removes this issue. Even better, change to a Wilson Combat 2 shot extension.
J.D. McGuire, Owner
AI&P Tactical, LLC
Remington Factory Certified
Law Enforcement Armorer