Tunnel Gun...

[nzl1a1collector]

I can confirm these things make a Trucking HUGE blast especially at night, I my youth I got to play with a similar toy before it was scrapped. You need to wear a welding mask to enable you to see where to aim for the next shot.... great fun thou.

Thunderbox is pretty well correct so far as the paperwork is concerned. I have only ever found two references to officially cut down rifles and both these are recorded as '....... previously unserviceable for field use.......'. These were the smoke discharger thinggy that went on the outside of light tanks early in the last war and the trench mortar firing things that are referred to as 'initiators'

It's like most things. Given a hacksaw and a set of gas bottles, then anything is possible.

Having said that, I'd like to set one up in a jig on the forensic test range at Shrivenham and record some data as a matter of interest. Unless anyne has some data already. Several years ago this would have been an interesting subject but commerciality has taken over - more's the shame!