Best left to a gunsmith
I believe the serial number is behind or to the rear of the rear sight. you should be able to see serial number without removing sight
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").
Best left to a gunsmith
Your eye is the rear sight.
you do for a marlin or mossberg
Pull the cover towards the rear sight and lift upwards.
best to check with a gunsmith.............................
drift out with punch from left to right, muzzle pointed away from you.
Use a punch and tap it across the barrel. Its a dove tail joint.
Requires appraisal
There are two screws securing the ramp to the barrel. One screw is quite obvious at the rear of the ramp. The other screw is under the front sight blade. Remove the front sight blade and you will be able to remove the mounting screw.