Great stock adapter. affordable - AIM Sports Inc Remington 870 Shotgun Pistol Grip W/6 Position Stock

The adapter doesn't come with instructions but it's easy enough to figure out. The pistol grip is not interchangeable but perfectly fine as it is. The stock it comes with is nothing special. The adapter has about as much drop as a normal 870 stock. I personally would purchase the adapter without the stock so I can attach the stock I want from the start