The ERGO Never Quit Magwell Grip reconfigures the squared shape of the AR-15/M4 magazine well.Reconfigures the squared shape of the AR-15/M4 magazine well into an ergonomic and comfortable grip optionFeatures:Gives AR-15/M4 receivers a distinctive aesthetic upgradeEasy installationOil and solvent resistantMust have mil-spec trigger guard for installationAllows arms to stay close to the body for a very sturdy holdCannot be mounted to lowers with permanent trigger guardWoodland CAMO color does not include green