Loaded old magazines!
When I lived in the UK, in the early sixties, I got a call from the local Police Station, "Mike can you come and look at this gun this Lady handed in" off I went, big grease proof brown paper bag, in it a WW11 Sten Gun, bolt forward, magazine snapped in.
(English Police and guns!!!?)
An other mag; in the bag also, loaded, took mag; off the gun, loaded! Cycled the bolt, perfect, unscrewed the barrel, pulled it through with a piece of string, and a bit of cloth, like new.
Off to the local tip, ear plugs in, a few bursts later, locked back, every round fired, picked up 60 shell caseings.The magazines would have been loaded 20 or so years then.
When the old guy passed away, the Sten was under the bed, ready to go! Make my day would have taken on a whole new meaning to a burglar!