This is a Ergo Grip Grip, model 4093-BK.
The ERGO AR15 Reduced Angle Swift Grip was designed for shooters who prefer or need to use a compact stance when shooting their rifle" such as in vehicle operations or while using PDWs. The reduced grip angle improves comfort and control. The textured shape provides a positive grip in all environments.
Features:
Reduced grip angle designed for compact shooting positions and PDW's
Rigid Polymer construction
Shape and textured for maximum handling and control
