I suspect they were for a NATO country bid.
I agree pinned would make them harder to disappear.
The front cap is interchangeable with either a flat, flash hider(?) or cutter
I have just started a 5.56 pistol build. Picked up a DD 11.5 inch barrel and one of these mounted in the end would be "nice".
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Go raibh tú leathuair ar Neamh sula mbeadh a fhios ag an diabhal go bhfuil tú marbh
"May you be a half hour in heaven before the devil knows you’re dead"
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