Title: They don't make the magazines for this design anymore.
Product review: This book is not for beginners. You will need a lathe and milling machine and the knowledge to use these machines correctly. From page 9 of the text: "A suitable magazine for this gun is available (at the time of this writing) from Gun Parts Corporation, West Hurley, New York. The company calls these "Universal" magazines. They are used in Thompson .22-caliber guns as well as a number of others." Unfortunately, the Thompson in .22LR is no longer being made. Hence the 30-round magazine are no longer made as well. And without a magazine, a machine pistol becomes a single shot weapon. So the design in the book is basically outdated right out of the gate. If you can find/obtain a 30 round, .22LR magazine from another manufacturer (or can make one yourself) and then modify the measurements of the lower receiver to accept the new magazine, then you might find this book a worthwhile purchase.
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