Kahr 1927-A1 Thompson Drum Rifle Magazine .45 ACP 50 Round Blued 1 Pack Steel T13KT-50RD. 75in. Will only fit 1927-A1 Thompson models. Note will NOT fit Thompson M1 models (Military version of Thompson-if it has a side charging handle then it is an Thompson M1 Model). Each drum is shipped with a drum installation device (3rd hand). Specifications for Kahr 1927-A1 Thompson .45 ACP 50 Round Drum Rifle Magazine: Manufacturer: Kahr Color: Blued Fabric/Material: Stainless Steel Magazine Capacity: 50 Round Caliber: .45 ACP Gun Make: Kahr Arms Gun Model: Thompson Model 1927A1 Package Contents: Kahr 1927-A1 Thompson .45 ACP 50 Round Drum Rifle Magazine What firearm models does the manufacturer say Kahr 1927-A1 Thompson .45 ACP 50 Round Drum Rifle Magazine is compatible with? The manufacturer suggests that Kahr 1927-A1 Thompson .45 ACP 50 Round Drum Rifle Magazine is compatible with Thompson Model 1927A1Kahr T13KT-50RD: 1927-A1 Thompson Drum Rifle Magazine .45 ACP 50 Round Blued 1 Pack Steel