How can I remove the dent, or should I go to a gunsmiths??
I would not recommend a DIY cure for this problem.
Above all things, don?t try to lever up the dent by pushing a screwdriver underneath it.
This could make things worse, and in an extreme case transfer the dent to the top barrel.
The problem is that when metal gets dented it also becomes stretched, and probably work-hardened as well.
Removing a dent in a rib is a professional job for a gunsmith.
The same goes for barrel dents ? leave them to the experts.