Thinkin': Looks to me like a fellow could install an Uncle Mike's barrel band swivel stud upside down out on the end of a Mosin-Nagant barrel. Then he could drill & tap a 3-56 or 6-48 hole in the tip of the stud and screw in a shotgun front sight. Problem is, I want a fiber optic. Shotgun fiber optics are 1/8" in diameter vs 3/32" diameter for a rifle fiber optic. Plus they have a wing on each side which would tend to hide ol' Mossyhorns. Thoughts. . . . .