SILVER EAGLE-TR SPORTER 12 GAUGE SEMI-AUTO 28" BARREL BLACK The Sporter is a fast handling gun equally at home at the range or in the field. Its sensitive but tough gas system assures perfect cycling with everything from target loads to 3 inches magnum shells (guaranteed for factory loads only). Optional shim kit allows you to adjust pitch and set cast to left or right handed. This gun uses Mobil thread pattern choke tubes.