Bullpupped Sterling SMG

Jonathan Ferguson, (keeper of Firearms and Artillery at the Royal Armoury in Leeds, England) made some remark in a EXP "expert reacts to game guns" YouTube video about whether the Sterling had ever been bullpupped and so i decided to take my E-11 blaster rifle model and rekerjigger it into one. don't think it's practical, i think i would be very concerned about getting bonked in the face by the magazine well.