Mag Release Button. For easier magazine changes! The aluminum mag release button was standard on the Gen 1-4 Whiskey-3 Chassis. It provides quick, ambidextrous access. It can be fitted to other KRG chassis. The polymer mag release button was standard issue on the Whiskey-5 gen 5 Chassis. The polymer mag release buttong is lighter and more ergonomic. Mfg: Kinetic Research Group
