can anyone identify this device?
it is a little under 10" long
it appears to fit the muzzle of a firearm
the tube on the end has a fine thread to screw it on; there is a
3/8" hole in the centre of the tube
the two hinged pieces attached by the threaded screw are marked
S499 and the bottom of the is marked L 26. No acceptance marks
it has been suggested it may be an early grenade launcher