S&W doesn’t make a revolver sized like the MR73. In the 4" configuration, the L-frame M686 weighs 42 oz, whereas the MR73 weighs but 33.5 oz. Even the anemic K-frame M19 is 2.5 oz heavier. The MR73 is on record outlasting both.
Good luck making the S&W rebound slide as slick as its roller-supported MR73 counterpart. You might as well try pitting a drag sled against a wheeled kart.