When I joined the RAAF in 1957, we were all issued with the 303 Enfield.
To comply with peace time rules, and at great expense the the RAAF had special racks with locks installed in each airmans bedside.
Then the 303's were withdrawn and we got the FN's which did not fit the racks and so all FN's were kept in the secure store. Then it was found for the FN there were no slings to be issued. The RAAF had sold all stocks of the 303 slings which interchanged.
Down to disposals went the supply staff and bought them back at a most inflated price. Eventually the brackets were removed from the airman's walls and the rooms repainted because of the patches.
Regards
Col