Those are three characteristics most often used to describe our SA-08(TM) and SA-459(TM) semi-auto shotguns. The dual valve system lets you tailor your load from upland loads to 3" magnums. The SA-08(TM) is trim, balanced, and a pleasure to carry, tipping the scales at just 5.5 - 6.5 pounds and offering smooth and steady "swing-thru" for quick and consistent target acquisition. The SA-459(TM) combines the smooth cycling action of our dual valve system with the comfort and control of an ergonomic pistol grip, for sure handling and comfort during high-stress situations. These models are designed to shoot heavy loads. Mfg: Weatherby Inc.