Interesting conversions, slight correction, they became avalable in 1985/86.

I've only ever seen two other converted No4's, interestingly both based on Savage builds.

I have one of the Saxby and Palmer Model 54 revolvers on my FAC, it's a bit of a safe queen to be honest, but I wanted​ to protect it from destruction.

I recall a few companies doing convertions of other firearms too before it was all stopped by the fun police, M1icon carbine and Enfield revolver prototypes come to mind among others.

All now considered Sec5 prohibited in the UKicon, unless you registered them on your FAC at the time of the ban (2004), can't be sold or gifted and need to be destroyed upon surrender of your FAC.

Lots weren't surrendered and I believe less than 50 of the converted No4's were eventually registered. My local force aren't even aware of the No4 builds!