Krnka was the first "quick-firing" rifle (скорострельная винтовка); the others were termed "breech-loading" rifle (казнозарядная винтовка) - according to the official Russian nomenclature. That's why I posted the cover page of the contemporary Krnka manual that shows the official name of the rifle....As to the first "quick firing rifle" what about the Terry-Norman percussion gun adopted 1866? or the Karle in 1867? The Baranov cossack rifle in 1869, maybe before the Krnka? They certainly made converted more Krnkas, but it wasn't the first.