Remington 870 12ga Push Button Mag Cap

From Brownells.com

All steel construction Black oxide finish Standard 1 inch loop push button swivel Manufactured in the United States Did your shotgun get heavy in the field last season? Try installing the Grove Tec Push Button Magazine Cap Set and add a sling. This set includes a replacement cap, which a push button swivel base and standard 1-inch loop push button swivel. The replacement cap accepts any Grove Tec push button or twist lock swivels or even the Multi-Adaptor stud for speed and versatility in the field. This magazine cap set is made of steel and finished with black oxide for rust resistance and a lifetime of use.