Back in 70s when S&W was heavy into police equippment the distributors started a extortion racket. To insure you access to S&W revolvers you had to purchase S&W accessorie package. I bought a lot of this stuff cheap from shops that went under in 80s and the local shows were full of it for
10yrs. Winchester tried a similar racket prior to WW2. It didn't work for
them either.