These reproduction 50 round steel drum magazines were made using original blueprints by a reputable defense contractor. Fits .45 ACP models 1928, 1921, 1927A1 and currently produced commercial semi-auto models. Blued steel. Over 500 sold, 100% satisfaction guaranteed, perfect fit and function! NOTE: 1928 DRUMS WILL NOT FIT Thompson M1s!!! They were never designed for that. **US SALES ONLY**