Citation(s) from the GunPolicy.org literature library
Bricknell, Samantha. 2012 ‘The Grey Market.’ Firearm Trafficking and Serious and Organised Crime Gangs; Research and Public Policy Series No. 116, p. xi. Canberra: Australian Institute of Criminology. 1 June
The Grey Market
[T]he grey market was the predominant source of long-arms to the illicit market - it accounted for 92 percent of all restricted long-arms and 86 percent of all non-restricted long-arms.