This is like playing poker with a Pinochle deck of cards. Interesting pistol, but there too few details in these photographs. Which, leaves us with questions:
The 'deer' head presents as 'upside down' and 'backwards' to the way we typically expect to see it, were it anywhere else. It's not so much a stand-alone carving but is adapted more to the function of the fore stock at a point that is near to accepting the ramrod. With the brass eyes and antlers, it has an Algonquin 'mask' like appearance. We can barely see half of the carving/art work. A better photo would probably help all of us.
Is the nose cap open or closed?
Does the front sling swivel also double as a barrel pin/key? Given the pipe spacing, I think it does.
From the quality of the photo, the 'leafy vine' looks more like it was "pressed' than carved. Regardless, it's worn virtually smooth and discernible by altering a light source across the surface.
Are the 'vine leafs' generic in design, or can they identified as belonging to a specific plant species and/or region? Artists are influenced by forms, designs and things that they are familiar with.
Does the design of the butt cap incorporate the swivel or does the swivel have a wood threaded post that penetrates the cap?
More questions than answers, at the present, so I'm not predisposed to a conclusion, or an opinion. The 'mask' and the 'vines' are intriguing features/details.