It's worth remembering that the L59 was an Army creature. Certainly in my neck of the Air Cadet woods about 10 years ago all the DP No.4s had been DP'd by drilling vertically through the chamber, welding up the striker hole in the bolt face and clipping the striker short ...

... and, er, that was it! Swap the barrel, striker and bolt head out and you'd have had a functional No.4 again.

I heard a rumour that when the order was put out to either hand them in for scrapping or have them deactivated to the civilian standard, some RAF armouries were prepared to turn a blind eye to robbing all parts except bolt, barrel and receiver. I recovered a few white blancoed slings from some DP No.4s returned to my local station but I didn't dare ask the grumpy old ex-WO1 in charge if I could have the furniture as well.

Some of them had white bands with a black DP, painted at varying heights and widths in the rough location that Peter gives. One or two even had US PROPERTY on the receiver...