This would be a question which can't be answered with any certainty, given that a lot of incidents have occurred over the years in which body counts were not accurately documented. There would certainly be a lot of contenders for this. The AK47 and its many variants would seem a possible answer. Any service rifle which saw action in the World Wars could be a contender, with the Mauser and Short Magazine Lee Enfield being in the running for top prize, especially given that both rifles saw much action in various colonial conflicts. Comparatively, the AK series rifles have served in comparatively minor conflicts, but their continued usage in modern times gives them a high likelihood of someday having this title, if they already have not done so.
The handgun was the only firearm he had with him.
None, a firearm has never killed anyone by itself, People kill people with guns, or they get shot when the gun is not properly cleared of any rounds.
Most of those killed were gassed to death.
most people are killed in afganastane.
The volcano in Indonesia has killed the most people. It killed 92,000 people.
1970 Bhola Cyclone killed 300,000-500,000 people.
Because mechanical systems fail, and people fail. If the muzzle is pointed at some one and you fail, they would ne injured or killed.
using a 9mm or anyform of firearm. Just aim for their cranium
Accidental firearm deaths accounted for 851 in 2010. Compare this to the more than 440,000 deaths by cigarette smokers.
Less than 1% of all firearm deaths involved what are CALLED assault rifles.
Fishing
Deer