Watch out for lurking Waffenampt stamps. I recall that some turned up amongst the last tranche of contract pistols that MoD were obliged to accept as part of the deal for L7 spares. FN must have 'swept the barn' because there was even one with a frame, 'slotted' for a butt-stock, amongst the pieces I examined - pity it's a registered part... (Sigh)
Today I was offered one of these without its case, no proof, no markings and very little plating left. I told the lad its worth 5 years B&B at Brendas big house so he should hand it in. View attachment 361856
On the other hand a section 1 or 7 holder could have it as a curio (so to speak) or for pest destruction should they want to use a slot and are willing to have it registered, proved and all of that faff.