To align the sight to the barrel you may have to slightly chamfer the hole in the barrel or rib. This is done with a larger drill bit. (Using only your fingers to spin the drill to remove a little metal from around the tapped hole.) You want the sight to be finger tight with about an 1/8 of a turn left before it is aligned. Remove the sight and use a drop of Locktite and install the sight. You can use a small wrench to adjust the sight to align with the barrel. If the shank is showing in the bore of the barrel you will have to shorten the shank.
This is intended to hold a shotgun bead so it may be screwed into a tapped hole, it is not intended for driving twist shank beads into untapped holes and may break if. Is there a way to tell if the bead is threaded or pressed by looking? It's an 870 express mag. I want to put a HighViz dot on the front, and don' want to chew up the current bead if it's not threaded.
Marble Arms ® 'Expert' shotgun beads are also available with fluorescent orange and green fiber optic cable. The cables are UV protected and permanently bonded to our machined from solid steel 'Expert' bases.
![Shotgun Bead Removal Tool Shotgun Bead Removal Tool](/uploads/1/2/5/4/125405825/864925748.jpg)
These brilliantly glowing beads will stand out in all light conditions and extend your shooting hours on heavily overcast days in the field. Bright enough to see clearly but unobtrusive enough to not alter the traditional look of your shotgun. Wing shooters and clay target enthusiasts will really be impressed with the light gathering qualities of the Marble’s ® Fiber Optic 'Expert' shotgun beads. Fiber Optic Expert Beads Tritium Expert. Marble Arms ® “ Extra-Lum Expert' shotgun beads have 50 percent more light gathering qualities of our standard florescent beads.
This extra bright bead really stands out in any light conditions. You can really rely on the brilliant “Extra-Lum Expert' bead. The UV protected fiber optic cable is permanently bonded to our machined from solid steel base.
The ends are highly polished to further guarantee as much light transfer to the eye as possible. Waterfowl hunters, turkey hunters and clay target shooters will find the “Extra-Lum Expert' a true enhancement to their shooting abilities.