There is nothing wrong with a GPR. I started out with one many years ago. They are a quality rifle, they just don't look anything like any original Hawken I have ever seen. I'm certainly not an expert, but I have handled about a dozen original Hawkens, over the years.
Not only is the GPR barrel too small in diameter, it's too short. The barrels on all of the Hawkens I have seen are longer. Barrel lengths on originals typically range from 33" to about 38". All I have handled had tapered barrels, with the exception of a very delicate squirrel rifle with a slightly swamped barrel.
The tang on the GPR is waaaayyy too short. The tang illustrated in Cooner's photo is typical of the Hawken style tang.
The GPR stock is too delicate to replicate a Hawken, the architecture isn't right, and as mentioned, the buttplate isn't quite right.
That said, there is nothing wrong with the GPR, they are good shooters, they just are nothing like an original Hawken.
Ya gotta remember the old mountain men traveled by horseback, so the weight of the rifle wasn't a big issue. Weight is an issue when carrying a rifle up and down hills and hollers and through the brush,
and I don't think I would want to carry a rifle as heavy as a real Hawken all day.
lspmmp,
I don't uderstand your complaint about someone wanting an accurate copy of an original rifle. Would a copy be a "Hawken", not in the sense it was made by the Hawken Bros, but in the sense that it would be a true to life copy. Nothing wrong with that. IMHO, it's better to know what a original Hawken rifle looks and feels like through a true to life copy than continue to be misinformed.
J.D.