Have a Enfield Cup launcher, RIA 1942 marked

Trying to find out info on a RIA 1942 cup launcher. a little longer than the standard, no side vent. Anyone know anything about them, never seen one before.

Some pictures may assist :

RIA ???????? RFI (Rifle Factory Ishapore) ?

Which part is marked with RIA/RFI, the base or the cup? Also pictures would help a lot.

Quote:

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Originally Posted by breakeyp

RIA ???????? RFI (Rifle Factory Ishapore) ?

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That was my 1st thought, but then he says it's "longer than normal and has no side vent" for distance adjustment,

Is it perhaps an American VB launcher? Would be odd to have a 1942 date but possible I suppose.

I've been doing a bit of research and can find nothing useful.

I'm assuming RIA is Rock Island Arsenal, but can find no evidence that they manufactured parts or accessories for Lee Enfield rifles.