This flex pistol grip is compatible with your mossberg shotgun with the flex system.It requires a 12 or 20 gauge flex stock adapter.
Type: Pistol Grip
Model: FLEX
Finish: Mossberg 500/590 Flex
Material: Synthetic
Color: Black
Height: Flex Tech
Type: Pistol Grip
Model: FLEX
Finish: Mossberg 500/590 Flex
Material: Synthetic
Color: Black
Height: Flex Tech