How To Change The Gas Control Screw On An FN Scar 

Simple way to make sure you don't cross thread a screw is to turn it in the direction you would to remove it till you feel a small click (that's called the Higbey notch, ask a firefighter) then screw it in and it shouldn't cross thread.

I have a 10" barrel on my SCAR, what size gas screw would you recommend when running an AAC M4-2000 suppressor?

Very cool the Midwest industries rail has to come off

If I'm doing this at the range, I'm gonna need a pocket full of gas screws.

Thanks for the easy install instructions!

Assume it is the same for an FS2000?

Can you show how to do this on a SCAR 20s?

Thanks for posting this video. Good to see how this is done. I have a SCAR but have not needed as of yet to change the gas screw shooting suppressed. Do you find the 10:00 valve setting GTG for shooting with many suppressors? I see a lot of internet chatter that FN voids the SCAR warranty is shot suppressed but FN told me that would only happen if the suppressor usage was the actual cause of damage.