None
Rib or front sight
It is possible.
3x0.5 thread
The thread size is: M3.0-.5 The Browning part number for the bead is B1116580
Very good question, but unfortunately the parts listings only show the part number and not the specs. You will need your guns serial number and call the Browning Service center to get the info you need. Here is a link to Browning parts: Early Citori's had a part number of: PO34332 for the front bead sight and post.
Lyman
The front sight is called "the front sight."
AnswerShotguns don't have sights. Just a bead at the front of the barrel. Incorrect. Some shotguns do just have a bead at the muzzle's end ... but, shotguns do indeed have aiming sights available. Typically, a shotgun designed to shoot rifled slugs will have conventional, adjustable iron sights with the rear sight mounted in the area above the trigger & and a blade sight ... sometimes with a colored line on the front sight. A typical name for shotgun sights is called Ghost Ring Sights. It came standard on my Mossberg 500 12 Ha. Shotgun.
1. Remove the screw to the rear of the front sight ramp.2. Remove the "blade" from the front sight ramp.3. Remove the screw from the front of the front sight ramp (which was formerly seated under the "blade").
line up the target on the top of the front sight while sighting the front sight through the rear peep sight.
I would go to browning .com.They have a link to serial numbers on the sight that should help you.
Yes, along with all the other shotguns.