Drill FF Tube for Rail System

[rocky]

Has anyone tried drilling a smooth FF tube (e.g. Hogue) to install a section of rail? If so, pics and tips?

[bigbob76]

I don't know what you're going to put on the rail but this is from one of my posts:

The tubular hand guard is aluminum and I think it's safe to say the threaded in stud will surely rip loose. I bought and installed this from Midway. Their product # is 411179. JP Enterprise Inc. JP hand guard floating stud adapter JPHGS. I removed the gas block and slid the threaded plate inside the tubular hand guard. It comes with a rubber O ring on the threaded stud but being an aircraft mechanic I couldn't bring myself to use that. I experimented with little stainless washers until I got the thickness that would give me the correct orientation of the swivel stud when tightened. I used thread sealant and while I had the gas block off I used the Dremel to make some dips in the bull barrel for the set screws on the gas block. I put the Harris bipod on and it worked out great.