They were made by numeric arms as an Hopkins & Allen in the late 60s-70s.
There were about a dozen variations made with different length barrels in .36 & .45.
They also made a really cool looking under hammer boot pistol I’d love to find.
Only 3 moving parts!
The trigger guard is also the trigger & main spring. Pretty ingenious if you ask me
Kinda sorta a rip-off of a ruggles under hammer.
Supposed to be a very accurate and dependable rifle.
I guess it was not so popular when it came out cause other folks thought it was ‘fugly’ too.