This is a short update on my article The Genesis of the Fireball XL5 Toy Rifle that I did last year. I noticed another Spanish version of it in this 1971 JUGUETES catalogue. The toy rifle is below, left page, centre, next to the robot. The maker was Jyesa. It seems plainer than the Capitan Marte rifle.
Over in Italy the prolific toy company Baravelli released a version of the Interstellar incarnation of the rifle as well. It's pictured in this catalogue bottom right retailing at 2000 Lire. Unfortunately I don't know the date of the catalogue. This rifle may well be the same as the Greek version.
Addendum: adding to the info in the first post here is a page on the cool Alphadrome website showing a Daishin catalogue 1970 featuring two Japanese versions of the rifle: