Yes there really was once a station serving the rifle range but it closed for good in 1921.
The Station was only a third of a mile north of the present Hightown Station (on the modern-day Merseyrail Liverpool – Southport line) and if my eyes were not deceiving me I am sure I could make out the brickwork of one of the platforms when I cycled by the site recently.
The station opened in 1862 and was called ‘Hightown Rifle Station’ but was renamed ‘Altcar Rifle Range’ in 1886.
A small narrow gauge munitions tramway ran from the station into the firing range.
I recently purchased a photo of the station and here it is:-
Click on the photo to enlarge it
And here’s a present day view looking north towards where Altcar Rifle Range Station would have been from the road over-bridge where North End Lane crosses the line above Hightown Station’s platforms:-