Ergo Grip Shines Grip Black. These AR15 Lower Parts by ERGO are designed for shooters who need to use a compact stance when shooting their rifle such as in vehicle operations or while using PDWs. The textured shape of the Ergo Grip Shines Polymer Grip provides a positive grip in all environments. Specifications for Ergo Grip Shines Grips: Manufacturer: ERGO Condition: New Features of Ergo Grip Shines Polymer Grip: Reduced grip angle designed for compact shooting positions and PDWs Rigid Polymer construction Shape and textured for maximum handling and control Package Contents: Ergo Grip Shines Grips Gapper Installation hardware What firearm models does the manufacturer say Ergo Grip Shines Grips is compatible with? The manufacturer says that Ergo Grip Shines Grips is compatible with AR-15Ergo Grip 4093: Swift Grip Black