Final answer:
The M4 Carbine has several different versions, including the M4A1, M4A2, M4A3, and M4A4. These versions have differences in features such as the fire mode, handguard, barrel assembly, and upper receiver.
Step-by-step explanation:
The M4 Carbine is a widely used firearms platform, primarily by the United States military. It has several different versions that have been developed over the years. Some of the notable versions include:
- M4A1: This is the fully automatic version of the M4 Carbine that is commonly used by special operations forces.
- M4A2: This version has a different handguard and barrel assembly compared to the standard M4 Carbine.
- M4A3: This version has a removable carry handle and a flat-top upper receiver which allows for the attachment of various optics.
- M4A4: This version is similar to the M4A3 but has a different gas system.
These are just a few examples of the different versions of the M4 Carbine, and there may be other versions developed by different manufacturers or customized by individual users.