the second part of things with the Law Dog Nat Wright.

and another melee Weapon Gadget.

This chain sword doesn't lose its bullets for bringing a "knife" to a gunfight.

The trick will be to convince an opponent to extend a shootout into a second round. Might I suggest Forsaken Hound?

Stacking any number of miracle or similar casualty reductions in the first round can also encourage an opponent to stick around for more - then surprise them with a second round Pinned Down.