Joe Poyer's book on the US Krag Rifle and Carbine has a section in the back (I have hard bound copy) covers these rifles. Kirk had them assembled from M1896 and M1898 U.S. Krag rifle parts. The M1898 action on my rifle was manufactured in 1904. The barrel and forearm were cut down to resemble a Philippine Constabulary Carbine with a Kirk band sight added to the muzzle (this front sight was a Kirk design; not a US 1905 sight). However, the muzzle was not relieved to accept a bayonet. The rear sight is a Model 1896 First Type (with small elevation knob) and Model 1896 handguard. It also has an original Kerr NoBuckl extended sling dated July 14, 1912. Poyer has an original advertisement that suggests that these models are good for general hunting.