“keep and bear” go together
You cannot separate them. If I can’t bear an arm, where am I to keep it? If I can’t keep an arm, I won’t be able to bear it or use it when I need it). In some countries, you might be able to own a gun, but are required to keep it locked up at the local gun club. The framers certainly had no such intent in mind.
to get it onto your property you have to bear it. to go to a range for practice you have to bear it.
since police carry based on the same rights eveyone does, any changes to ‘bearing’ would apply to them as well. the same laws allow them to have guns and carry them.