I sure wish somebody would start making this again or a redesigned version the same size.
Possibly Rohrbaugh could design one?
This WAS the Downsizer WSP.
And YES...it is a .45acp caliber.
You can FORGET trying to find one anywhere.
There are just none of them around.
There never were that many made in the first place.
It has got to be a very simple trigger mechanism.