The gas system on these new models has been improved by the addition of a spinning and self-cleaning action. As gas pressure is fed into the gas cylinder, a series of expandable fingers on the piston expand outwardly to clean the gas cylinder as the action cycles. The gas piston uses a spinning motion and "scraper teeth" to ensure carbon deposits are thoroughly dislodged from the gas system. This contributes to a 40% improvement in reliability and a maintenance reduction of 50%. Another new feature is the X-tra Grain stock finish, a new technology that highlights the color contrast of the wood, resulting in a beautiful and rich pattern. 5 Optima chokes; case; extra recoil pad (thinner); 14 3/4" l.o.p.; 8 lbs.