A firearms dealer has been found guilty of supplying illegal handguns and home-made bullets linked to more than 100 crime scenes, including three murders.
Paul Edmunds, of Hardwicke, Gloucestershire, supplied ammunition used in an attempt to shoot down a police helicopter in the 2011 riots.
He will be sentenced on 20 December.
The court was told Edmunds imported a Colt pistol used in a fatal shooting at a London nightclub and supplied ammunition used in two other killings.
Jurors also convicted him of possessing a prohibited air pistol and perverting the course of justice by filing down a bullet-making tool to destroy potential evidence.