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Wiki information Krnka:
The M1867 Russian Krnka was a breech loading conversion of the muzzle-loading Model 1857 Six Line rifle musket designed by Czech arms maker, Sylvester Krnka. It was adopted by the Russian Empire in 1869, and was similar to the contemporary...
A Krnka may be referred to any variant of a pistol designed by Karel Krnka, a late 19th Century designer from Bohemia, or the rifle designed by his father Sylvester Krnka for the Russian military.