M1 Garand (canon)

Overview
The M1 Garand, like most semi-automatics, is useful for early to mid rounds and can be used even further if going for headshots. It can can also come with or without a Rifle Grenade in World at War, but it cannot be found with one in Black Ops.

Pack-a-Punched Version
When it is upgraded with the Pack-a-Punch Machine, it becomes the M1000, and if it has a rifle grenade, the rifle grenade becomes The Imploder.

M1000
The M1000 has higher damage, a bigger magazine, and more maximum ammo.

The Imploder
The Imploder is fully-automatic and fires three grenades before having to reload, has a higher damage, and has more ammo. It is the best weapon for making crawlers, but is often overlooked for more powerful weapons.