Countries from the G8 group of wealthy nations have been accused of continuing to sell arms to regimes using them to abuse human rights.
The claim comes in a report published by the Control Arms Campaign - a group made up of organisations including Oxfam and Amnesty International.
It has been timed to coincide with a London meeting of G8 foreign ministers.
This week's meeting is due to discuss the adoption of a UK proposal for an International Arms Trade Treaty. G8 weapons have been exported to countries including Sudan, the Republic of Congo, Colombia and the Philippines, according to the report.
Oxfam's Simon Grey said the campaign was calling for a "responsible arms trade".
We're not calling for a ban and, in actual fact, in the UK we have the support of the Defence Manufacturer's Association, the arms industry's representatives," he told BBC News.
We're calling for tough controls on the arms trade so that the number of 500,000 people killed each year from armed violence can be reduced.
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