The M1867 Russian Krnka was a breachloader conversion of the muzzle-loading Model 1857 Six Line rifle musket

Rifled musket

The term rifled musket or rifle musket refers to a specific type of weapon made in the mid-19th century. Originally the term referred only to muskets that had been produced as a smoothbore weapon and later had their barrels rifled...

, similar to the contemporary Snider-Enfield

Snider-Enfield

The British .577 Snider-Enfield was a type of breech loading rifle. The firearm action was invented by the American Jacob Snider, and the Snider-Enfield was one of the most widely used of the Snider varieties. It was adopted by British Army as a conversion system for its ubiquitous Pattern 1853...

 and Tatabatiere conversions. Conversions were carried out at the Tula armoy (TOZ). The weapon was chambered for a 15mm cartridge.

Two main versions were produced: infantry and cavalry rifles. Shortly after its introduction to service, the M1867 was replaced by Berdan rifle

Berdan rifle

The Berdan rifle is a Russian rifle created by famous American firearms expert and inventor Hiram Berdan in 1868. Standard issue in the Russian army from 1869-1891, the Berdan was replaced by the Mosin-Nagant rifle...

, though both weapons would serve simultaneously for a time.

The M1867 was used in action during the Russo-Turkish War of 1877-1878.