My second version of the M1928 Thompson, this time with improved handles (I designed them by looking at a picture of real thompson handles) being the main adjustment. When the bolt goes back, the ejection port opens, and when it goes forward, the ejection port closes. Even though the picture is kind of blurry, the rear sights do flip up, and you can se through them. For more details look at my first M1928 Thompson. Enjoy.