Impala Plus Shotguns Offer an Incredible Value For both Hunting and Sport Shooting They are designed to operate with a semi-automatic kinetic reaction system. This important development is gaining market share with its flawless operation and reliable performance. The Impala Plus system has registered patents and was produced after an extensive technological engineering study in order to bring a unique design system to market. This particular version comes standard with a Synthetic field style stock and Bi-Tone finish.