Auto Ordnance T1, Semi-automatic Rifle, 45ACP, 16.5 Barrel, Parkerized Finish, Black, Walnut Stock, Adjustable Sights, (1) 20Rd Stick Magazine & (1) 50Rd Drum, 2 Magazines T150D For more than 100 years, the Chicago Typewriter has been a favorite among collectors and shooting enthusiasts. The Tommy Gun is available with a steel receiver (T1 models) or a lighter weight aluminum receiver (T5 models).