The Vism MOS 500 590 PG Stock Adapt features finger grooves, a non-slip textured surface, QD sling attachments on both sides, hidden storage compartment with tight-sealing door, and has a modular design that is easy to configure with many options. It allows you to use AR style collapsible buttstocks with the optional AR style stock adaptor attachments and is compatible with other NcSTAR optional items, such as end cap or folding stock adapters. It features a reinforced polymer composite construction and includes all mounting hardware. This pistol grip adapter is compatible with Mossberg 500, 590, and Maverick 88 shotguns.

MOSSBERG 500 and 590 MAVERICK 88 modular ergonomic pistol grip adapter with finger grooves and textured non-slip grip
Grip adapter works with the optional: grip end cap, AR style fixed, and left and right folding stock Commercial-Spec adapters
Allows you to use AR style collapsible buttstocks Commercial-Spec with the optional AR style stock adaptor attachments