I can't make out the details of engraving to read a name on the gun. the picture is only a small thumbnail of a higher quality one not available there and is too fuzzy to enlarge.
I may be mistaken but that looks to be one of the Fausti sisters holding one of their guns in the white. she is holding it extended towards the camera. it is actually fairly slim in profile (compare it to her fairly small hands). if it is a shotgun it looks as if it would be a small gauge/frame (perhaps 28g?) . Might be a rifle, but no sign of iron sights or scope mount visible.
Probably easy to search the Fausti catalogs and P/R articles to find out.
JMHO
