They absolutely do carry them. You have to call Remington Customer Service and ASK for them. They are $68.00 plus shipping. I cannot see how they could make a gun any heavier than the factory stock, wood, synthetic knoxx-type or otherwise too. There is no rhyme or reason why you should have to go through all the hassle of modifying a 12 gauge model to fit your 20 when they sell them right from Remington direct. I took the Knoxx NRS off of my 870 youth gun I built this spring and put on a Shur Shot and it drastically lightened her up!