Although it is not on the OIC list of prohibited guns is it considered a variant?
Had to bring mine to cop shop back around 1998-99 to have it 'adjudicated' on. Lots of confusion back then (and apparently still!) about all the newly imposed laws. The Hamilton FO measured the barrel and pointed out the brake wasn't included then checked some 'list' and handed it back saying it was exempt. Sure was odd walking in and out of Central Station with a rifle. I could feel the eyes of each cop tracking my every step.
Had a buddy who couldn't put a pistol case on his motorcycle so he had a permit for a visible shoulder holster to and from the range.That turned heads along with his black lab that rode on the seat behind him wearing WW1 aviator leather hat with googles.
The metal is the SB model 20 drops right in that stock identical.