The weapon was the first semi-automatic rifle to be generally issued to the infantry of any nation. Called "The Greatest Battle Implement Ever Devised" by General George S. Patton, the Garand officially replaced the bolt-action M1903 Springfield as the standard service rifle of the United States Armed Forces in 1936.
The weapon has a capacity of 8 rounds and the player can carry an additional 32, for a total of 40 rounds. It's a semiautomatic rifle with minimal recoil and extremely accurate at long range. It occupies a slot in the bottom of the weapons HUD along with other rifles.
They're first used in Chapter 1, this is the weapon Vito starts with. It can be found later in The Wild Ones, where it will be sitting on a crate inside the foundry. They become available for sale at Harry's Gun Shop in Chapter 12 and at McClusky & Son shops in Chapter 13.
In all three Mafia II DLCs they're available for purchase at Harry's shop and McClusky & Son's from the start.
You can find more real world information about the M1 Garand on its Wikipedia page.
- It can be obtained as early as Chapter 2 by killing the clerk at Stella's Diner; however, obtaining ammunition will require repeating the process.