This is a Ergo Grip , model 4454.
Use ERGO's Mossberg 500 Tactical Stock Adapter to install AR-15 type stocks and pistol grips on your Mossberg 500/590 shotguns. It can be used to shorten the length of pull on your favorite scattergun to a more manageable length. Any standard AR-15 grip will also bolt right on" further increasing ergonomics.
Features:
For Mossberg 500/590
Includes Allen wrench
Accepts any standard AR-15 buffer tube and grip
