This Stevens manufactured barrel adjustment ring is for the Favorite single shot falling block rimfire rifle which has the barrel with a short amount of threads at the rear section so that this ring is able to attach to it and be adjusted between the barrel and receiver to remove any play between the two parts. This checkered ring is in very good condition exhibiting a grayish brown patina with light wear and impact marks. (file photo)

Note: This part is commonly found on 6th variation receivers.