I'm a huge fan of the Model 30, purely because it has the history and looks with performance to match in terms of accuracy and consistency.
Mine shoots Hobby pellets at an average of 583fps and is very accurate downrange. I'd have preferred a slightly larger feel to the rifle but accept it was made for youths rather than adults.
Purely conjecture on my part but Milbro undoubtedly acquired the tooling to make these but this was during the late 1940s and we had just finished 6 years of fighting. There was probably little appetite for an air rifle based on a recent enemy's Mauser service rifle but some of the Model 30's features went on to be used on the Milbro G55, such as the tap and underlever loading.
I must dig mine out for a range session one of these days.
John
Currently looking for Baikal Makarov pistols with the following prefixes to the serial number: 98, T01, T09, T21, T22
Prefer boxed or cased but will consider loose examples too.