I can also recommend the book Jack Hinson’s One Man War, A Civil War Sniper by Lt. Col. Tom McKenney, USMC (Ret.)
The formal appellation Springfield Model 1892-1899 describes the several subvariants of the Krag-Jorgensen bolt-action repeating rifle developed in the late 19th century. U.S. troops affectionately referred to the weapon as a “Krag.” The rifle was actually a collaborative effort of Norwegian gun designers Ole Herman Johannes Krag and Erik Jorgensen. The Krag was developed at a time when the entire planet was discovering bolt-action repeating infantry weapons. It nonetheless featured some radical new design elements.
Where most contemporary designs featured an internal box magazine loaded via stripper clips from above, the Krag magazine and its lateral loading system were integral components of the receiver. To load the weapon, you pivoted open a machined steel cover on the right and fed rounds one at a time from the side. Eventually, the army issued a claw-style clip that allowed the magazine to be loaded in a single step.
“Time obliterates naive fictions of opinion and confirms decisions of nature” -Cicero