Oh yeah, just the accessory for those late night trench raids.
Looks to be a better made reproduction than SARCO (I think) had in the late 1980s. With some files and emery cloth those could be made to fit and the mechanism to work. They looked like they came straight from the Darrah arms shops over the Kyber Pass.
The Indian-made repros are a lot better made than the chicom ones. Of course the Chinese add genuine rust to their blades to give that extra bit of authenticity.