This is a European American Armory Single Action known as the Bounty Hunter chambered in 45 Long Colt, model 770022.
The Bounty Hunter is a traditional 6 shot single action revolver with traditional resting notch" but it also has a transfer bar and recessed chambers for shooting safety. There are a lot of single action revolvers out there but none better than The Bounty Hunter from EAA Corp.
Features:
Single Action Revolver
Recessed Chamber
Transfer Bar
Half Cock Position