Ergo AR-15/M-16/M4 Never Quit Magwell Grip Graphite Grey. The installation of the Ergo Never Quit Grip is really easy. The last thing you need to worry about is complicated directions and a million steps to put something together. The oil and solvent resistant Santoprene construction combined with the distinctive aesthetic upgrade contribute to why the Ergo Grips Never Quit Grip is NTOA recommended. So stop messing around and get yours critically acclaimed grip now Specifications for Ergo AR15/M16/M4 Never Quit Magwell Grips: Manufacturer: ERGO Gun Model: M16 M4 AR-15 Fabric/Material: Polymer Condition: New Gun Make: AR Platform Mount Type: Trigger Guard Mount Design: Magwell Grip Features of Ergo Grips Never Quit Magwell Grip: Easy Installation Oil and Solvent Resistant Santoprene Construction Reconfigures the Squared Shape of the AR/M4 Magazine Well into an Ergonomic and Comfortable Grip Option Distinctive Aesthetic Upgrade Package Contents: Ergo AR15/M16/M4 Never Quit Magwell Grips What firearm models does the manufacturer say Ergo AR15/M16/M4 Never Quit Magwell Grips is compatible with? The manufacturer says that Ergo AR15/M16/M4 Never Quit Magwell Grips is compatible with AR-15 M4 M16Ergo Grip 4965-B-GG: Never Quit Grip. Fits AR15/M16/M4 Magazine Well Graphite Grey