Mossberg 500 12ga. Push Button Magazine Cap, 1" Loop, Black.Made from high quality materials and made to last. GroveTec is the American standard in Slings, Sling Swivels and Firearm Accessories. With a GT(TM) Sling Swivel in hand, you'll immediately recognize its quality. Close tolerance machining assures a snug, solid fit with a minimum of noise. Push Button Swivel caps replace the factory magazine cap and come with GT Push Button swivels. Replaces factory thumb bolt to use push button swivels on Mossberg 500 12 Ga. For Mossberg Model 500 shotguns in 12 Gauge Fits 1" Slings Premium Black-Oxide Finish All Steel Construction Detachable Design 100% Made in the USA