Rifle Grenade Launchers

Is it legal to own rifle grenade launchers in Canada as I don't ever recall seeing any at Canadian shows?

Yes, they're legal. They just fit a muzzle like a bayonet. They do appear at shows, just not often.

Thanks for the info I recently bought a collection and found a couple in a box of odds and ends. after spending several evenings searching online I discovered one is for the No 4 MK1 and the other for the No 5 MK1 jungle carbine

I would say that you have struck oil with the No5 launcher. Rare as rocking horse manure as I understand it. Not quite as rare as the sight part but that is identical to the No4 one in any case

You should take some pics and post them here...perhaps some one here would pay you a king's ransom...

The sad part about these pre-Energa sightless grenade launchers is that there were a load of these sights, still in thick grease wrapping in the back store at one of the big Command workshops when they were having a big clear-out prior to its closure. Bayonet bend box and thing for replacing the laces and chapes for the scabbards too!. It's called '....wise after the event!'

We had the same, most went out to the scrap dumpsters.