This is a 30 inch magazine tube Winchester 1866 (1866 after 14,000) 1873, 1892, 1894 Rifle. It fits the Special order rifles that have barrels longer than 26 inches in Large cals. (30-30, 38-55,38-40 -44-40,.357 and .44 cal, and all cals in the 1866) It has holes drilled through for the magazine plug and screw. This tube can also be used for custom length barrels. This is also the magazine tube for Marlin models 1894, 1889, 336, 444 and early 1893 . Also sears model 54. Use magazine spring ms73. (exact lenght varries from 30 inches to 32.25)