Just bought a small lot of S&W parts for J-K-N revolvers. In the lot was weight listed for 41/46 S&W. Didn’t pay much attention because not looking for a weight. I thought it was one of those than goes in under the muzzle in some models. Turns out it is a barrel weight with single screw attachment. Has small radius to meet barrel. I checked Browning,Hi-STD,Colt and can’t find such weigh listed. It is a quality piece in machining and blue. Anyone got idea of what model it’s for?