The Berdan rifle (винтовка Бердана/vintovka Berdana in Russian) is a Russian rifle created by the American firearms expert and inventor Hiram Berdan in 1868. It was standard issue in the Russian army from 1870 to 1891, when it was replaced by the Mosin–Nagant rifle. It was widely used in Russia as a hunting weapon, and sporting variants, including shotguns, were produced until the mid-1930s. The Russian Berdan I (M1868) and Berdan II (M1870) rifles of .42 caliber are distinct from the Spanish Berdan 15mm (.58+ cal) conversion rifles adopted by Spain as the M1857/67 Berdan (and related engineer, artillery & short rifles). Berdan I Two different versions of the later single-shot Berdan rifle were adopted as service weapons by Imperial Russia. The first version, manufactured by Colt in the US, is known as model 1868, or Berdan I. It is a hammerless "trapdoor" breechblock design, and was manufactured in limited numbers (the contract stipulated 30,000) as a full-length infantry rifle. Colt also manufactured a few half-stock Berdan I cavalry carbine prototypes, but these were never adopted for Russian service. Colt even produced a few target rifles based on the Berdan I. Berdan II The model 1870, or Berdan II, is a single-shot bolt-action with a distinctive short, pear-shaped bolt handle. The bolt handle serves as the only locking lug for the action, and when closed, points upwards at a 30-degree angle, rather than horizontally. The Berdan II was produced in four variants: an infantry rifle, the lighter and slightly shorter dragoon rifle, a Cossack rifle with a button trigger and no trigger guard, and a cavalry carbine. Infantry and dragoon rifles were issued with quadrangular socket bayonets. Initial production of the Berdan II was at Birmingham Small Arms in England. The rifles were later manufactured in large numbers by Russian factories at Tula, Izhevsk, and Sestroretsk. Estimated total production of all models is over 3 million. The rifle was known for its accuracy, simplicity and reliability. Cartridge The 10.7×58mmR cartridge used in the Berdan was also invented by Hiram Berdan, with the assistance of Russian colonel . It was the subject of many patents in both the United States and United Kingdom. The bottleneck cartridge case used the Berdan primer, its first use in a small arms cartridge. Cartridges were issued in blue paper packets of six rounds each. In addition to the regular cartridge for rifles, a special cartridge