Gosho Aoyama's Collection of Short Stories
Gosho Aoyama's Collection of Short Stories is a 1999 OVA in which many anime adaptations of Gosho Aoyama's short stories from 1986 to 1988 were published. These are four direct adaptations of short stories, an adaptation in which the characters in the manga have been replaced by characters from detective Conan, a story with Yukiko, Yusaku and Shinichi Kudo that the anime team came up with and an OVA with the Detective Boys, which serves as the making-of of the regular Detective Conan Anime.
The following weapons were used in the OVA Gosho Aoyama's Collection of Short Stories:
The Government Agent Gray drops by mistake his Beretta 92FS with wooden grips which is picked up by Keisuke Hara in Ep. 03 "The Santa Claus of Summer". Some Men in Black are also armed with Beretta pistols in Ep 04 "Detective George's Mini-Mini Big Strategy".
George Kirishima uses a Flare Gun in Ep. 04 "Detective George's Mini-Mini Big Strategy".
What seems to be a Walther PP is used by the small detective George Kirishima in Ep. 04 "Detective George's Mini-Mini Big Strategy".
Nambu Model 60
A drawing of a Nambu Model 60 revolver is seen in Ep. 07 "Making of Detective Conan".
An M1 Abrams tank can be seen in Ep. 03 "The Santa Claus of Summer".
General Dynamics M197 Vulcan
In the same episode, General Dynamics M197 Vulcans are seen mounted on Japanese Air Self-Defense Forces AH-1W Super Cobra helicopters.
M240 Machine Gun
The M240 machine guns are mounted on the Abrams in co-axial mounts.