One of around 50 FN EXP-1/SLEM prototypes developed by Dieudonné Saive, it was made in late-1940s in 8mm Mauser and would eventually become the FN-49.
Posted by Dear_Implement6304@reddit | ForgottenWeapons | View on Reddit | 6 comments

Elroyy_@reddit
Lee Enfield sling?
Drallo@reddit
What's the plunger next to the trigger guard?
Rockfish00@reddit
probably a manual bolt hold open
KingofSkies@reddit
It's gorgeous
Woodlog82@reddit
Very elaborate design.
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