Lower the angle of the stock up to .5" with this stock drop spacer to improve alignment with the front bead sight. It is made of an extreme-temperature, glass-reinforced polymer and is compatible with ATI's six-position collapsible stocks for Mossberg 500/535/590/835, Maverick 88, Remington 870 and Winchester 1200/1300 shotguns. Improves alignment with front bead.