It is the second positive test in Northern Ireland this year, but top vet says it is not unexpected.
Police say batons were used to break up a fight outside a bar on William Street in Lurgan.
Michael Ginesi was pronounced dead at the scene of the crash in the early hours of Saturday.
Translink say a number of services are currently experiencing delays following the incident.
The weapons including two shotguns, four handguns, explosives, ammunition and a suspected mortar tube.