I looked at a Colt US Model 1917 revolver, and it had a small hole drilled into the muzzle end of the barrel. It did not extend into the bore, but was on the underside of the barrel. It was very well done. What is this?
Firing it today, the front sight fell off- just fell off. I put it back on- it pushed over the bayonet lug. Before I did that, I can see that there is a pin-way cut into the barrel and a pin directly under the front sight blade. Any insight into why this happened, how to properly re-install...