Ergo

The ERGO Never Quit Magwell Grip reconfigures the squared shape of the AR/M4 magazine well. - Reconfigures the squared shape of the AR/M4 magazine well into an ergonomic and comfortable grip option - Gives AR/M4 receivers a distinctive aesthetic upgrade - Easy installation - Oil and solvent resistant Santoprene construction - NTOA Recommended - This fits AR-15/M-16 lower receivers with a removable trigger guard. It does not fit AR-10 large frame receivers or receivers with a permanently attached trigger guard.