From the Specialty Pistols web forums, this is member 7STDUBBERU’s .50 Alaskan (!!) Encore pistol.
As drool-worthy as the handgun may be, I linked the pic mainly because of the background — it’s “about 2/3” of his backyard 3D course (no those are not live deer).
Kewel! I want a backyard 3D course….