I recently completed a Kibler Colonial with the GM barrel with upgrades like the machined-in barrel tenons. The rifle Is a perfect example of American ingenuity that combines modern methods with top quality components and historical continuity. Price is kept low by taking advantage of standardization within the two models. I can’t speak to the SMR, but I find most of the accolades of the Kibler are directed at appearance and component attributes. IMO, the attribute that trumps the aforementioned with my 58 cal Colonial, is the more subjective aspect of the ergonomics, balance, and shooting qualities. Of the several colonial style rifles I own, this rifle really stands out. It’s 1-2 pounds heavier, but has perfect balance. The stock fit and sights land perfectly. Accurate, off-hand shooting is an afterthought. Perhaps an individual of different physical characteristics may assess this differently, but I did find that my matched 50 caliber barrel did not have the same ergonomic qualities of the 58 cal.......attributed to the dimensional standardization, this combination was front heavy, not possessing the same balance as the 58...for me. IMO, this is something that one should think about when purchasing the Kibler.