hey guys, be so kind as to clarify which rifle the ultra comp is? i have searched the H&R site and see no such rifle. also is it my understanding that the O ring mod on the forend to free float the barrel is simply putting the proper sized oring in place to act as a spacer. how tight do you make the screw as far as foot lbs, or just go snug, and this wont effect the opening action of the rifle? thanks in advance fellas..