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 / Updated  / Source: NBC News

MOSCOW — Mikhail Kalashnikov, whose work as a weapons designer for the Soviet Union is immortalized in the name of the world's most popular firearm, has died at the age of 94.

The AK-47 — "Avtomat Kalashnikov" and the year it went into production — is favored by guerrillas, terrorists and the soldiers of many armies. An estimated 100 million guns are spread worldwide. The AK-47 has been used to kill more people than any other firearm in the world.

Image: Russian arms designer General Mikhail Kalashnikov hospitalised
Russian arms designer General Mikhail Kalashnikov holding his iconic 'Kalashnikov' machine-gun during the celebrations of the 50th anniversary of the first version AK-47.SERGEY CHIRIKOV / EPA

Kalashnikov died Monday in a hospital in Izhevsk, the capital of the Udmurtia republic where he lived, said Viktor Chulkov, a spokesman for the Ural republic's president.

Kalashnikov often said he felt personally untroubled by his contribution to bloodshed.

"I sleep well. It's the politicians who are to blame for failing to come to an agreement and resorting to violence," he said in 2007.

Though it isn't especially accurate, its ruggedness and simplicity are exemplary: it performs in sandy or wet conditions that jam more sophisticated weapons such as the U.S. M-16.

"During the Vietnam war, American soldiers would throw away their M-16s to grab AK-47s and bullets for it from dead Vietnamese soldiers," Kalashnikov said in July 2007 at a ceremony marking the rifle's 60th anniversary.

The weapon's suitability for jungle and desert fighting made it nearly ideal for the Third World insurgents backed by the Soviet Union, and Moscow not only distributed the AK-47 widely but also licensed its production in some 30 other countries.

The gun's status among revolutionaries and national-liberation struggles is enshrined on the flag of Mozambique.

Kalashnikov, born into a peasant family in Siberia, began his working life as a railroad clerk. After he joined the Red Army in 1938, he began to show mechanical flair by inventing several modifications for Soviet tanks.

The moment that firmly set his course was in the 1941 battle of Bryansk against Nazi forces, when a shell hit his tank. Recovering from wounds in the hospital, Kalashnikov brooded about the superior automatic rifles he'd seen the Nazis deploy; his rough ideas and revisions bore fruit five years later.

"Blame the Nazi Germans for making me become a gun designer," said Kalashnikov. "I always wanted to construct agricultural machinery."