Winchester SX4 Upland Field 12GA semi-auto shotgun first impressions. The Winchester SX4 Upland Field model is a good-looking shotgun, with the right features and offered at an affordable price which can be improved a little by take some time to shop around. And importantly, the SX4 gives the strong impression of good versatility with its ability to easily handle a variety of loads and to shoot respectable patterns. The SX4 has oversize controls, is light weight, is a fast shooter, is a soft shooter due to the Winchester Action Valve Gas System, has good balance, is easy to maneuver, comes with 3 choke tubes, shoot respectable patterns, and is easy to disassemble and reassemble. This “first impressions” review includes specifications and pros and cons. A detailed demonstration of disassembly and reassembly with important suggestions for easy success are provided.