A common mistake that people make when trying to design something completely foolproof is to underestimate the ingenuity of complete fools!!
Douglas Adams, 1952-2001 RIP
There should be a long threaded screw that screws into the hole at the bottom and comes out flush with the elipical hole at the front of the follower for loading .22" Shorts as well as .22LR.
I have a 42M somewhere I'll find it and check against the photographs.
Come on Bambi get some
Imperial Good Metric Bad
Analogue Good Digital Bad