These are larger and with the palm swell fit my hand perfectly allowing greater control of the rifle. The softer material also helps with recoil.
Both grips now have a storage area secured with tool free screw cap. A captive thumb nut tightens the grip to the rail on both models. Both models have two locking lugs to prevent any front to back movement along the rail.

Detailed Product Description
Material: High Density Fiber Polymer
Mount Base:Picatinny/Weaver
This tactical vertical fore-grip integrated with a strong and stable bi-pod.
The Grip Pod's legs deploy at the push of a button – instantly.
Push Button to unlock Bipod Legs, and retract the Spring Loaded Legs by pushing back in.
It mounts directly to Weaver/Picatinny rail systems.
Use as a foregrip as well.

Features
Has short, compact size that keeps hand close to weapon
Fits any weapon with a standard picatinny lower rail
Has durable, hard-wearing, lightweight reinforced polymer
Ergonomic Finger Grooves for Most Comfortable Grip