4" Smoke discharger cup
 

I am trying to find a 4" smoke discharger cup to complete my smoke discharger set. Any help with this would be much appreciated.

I'm confused, as usual, was that a typo and you want a cap not a cup?

Can we get a bit more detail?

R

4" smoke discharger cup
 

Robin,
The item I am after is the screw on 4" barrel/cup if you will, that threads on to a modified Lee Enfield or Ross Rifle. The rifles had the barrel shortened, threaded, to accept the cup. A charge was placed into the cup and fired out of the rifle cup using a blank cartridge. This set up was found on Mk1 & Mk 11 carriers.
I am looking for the 4" cup. Hope that my explanation was sufficient?
Doug

ps,
Michael,
Thank you for the added pictures.