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- Fact 1: Training devices (DVCs, in the military shorthand) were originally contracted by the US Navy during WWII, and intended to better demonstrate weapon use and maintenance to recruits.
- Fact 2: While literacy was a requirement for military service, training with models was found to be a far more successful method than written manuals.
- Fact 3: The most common military training models, the M series produced by the Dellenbarger Machine Company, are double-scale models of standard weapons and came with carrying cases that doubled as display stands.
- Fact 4: An rare oversize cutaway model of an M1 Garand can be found on display at the Springfield Armory, now a National Park.
- Fact 5: Some educational models featured moving mechanisms, and cycled oversize dummy bullets to demonstrate the gun's function.