I have heard of several people using the Harris mount and it works well. I used a T nut from a local hardware store, I thiink the thread size is 10-32 on the studs. I drill a hole about 2" back from the gas block, inserted the T nut under the liner. I had to cut the stud length down a little so it would fit under the liner, then used loctite to secure.
Remember the battle of Athens, TN!
"Work as if you were to live 100 Years, Pray as if you were to die To-morrow." --Benjamin Franklin