Just another of those '.....matter of interest' moments. But...... Just looked at a 60's Bren EMER miscellaneous instruction relating to Bren guns '.....and those guns in service with Mk2 type butt slide assemblies fitted with........' Blah blah, but in short, the solid Mk2 pistol grip screw BE4136. Due to the coarse BSF thread of this simplified machine screw that was notorious for unscrewing and causing a loose pistol grip it was recommended that the screw thread be heated and coated with hot animal glue (preumably the old hot bone mix animal glue we used to patch wood) prior to fitting and tightening. This would prevent it coming loose during service.
Hopefully, unlike some lok-tites, it'd be easy to break free if and when the Armourers needed to do so! Just another useless bit of info if you have encountered something like this old crud on yours and wondered what it was.
The interesting bit of this, in a nerdy sort of way, is that it confirms what we already realised from pictorial evidence is that any mark/type of Bren could have a Mk2 type butt slide fitted.Information
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