The description below is taken from the Airfix catalogue this kit was first seen in. There may also be extra information underneath the main description.

Airfix Catalogue description:

Gun with firing mechanism and shells.

Airfix Catalogue information:
Series: 1
Rarity of early version: Scarce.
First Issued: 1971
Catalogue Ref - 8th Edition (1970): 1762
Catalogue Ref - 9th Edition (1971): 1762
Catalogue Ref - 10th Edition (1973): 51500-3
Catalogue Ref - 11th Edition (1974): 51500-3
Catalogue Ref - 12th Edition (1975): 51500-3
Catalogue Ref - 13th Edition (1976): 51500-3
Catalogue Ref - 14th Edition (1977): 51500-3
Catalogue Ref - 15th Edition (1978): 51500-3
Catalogue Ref - 16th Edition (1979): 51500-3
Catalogue Ref - 17th Edition (1980): 51500-3