The M3, better known as the Grease Gun, is a submachine gun from the United States used by soldiers in the 1940s at the beginning of its production, it was one of the most used weapons in conflicts around the world due to its simplicity of assembly and easy maintenance, and can be easily discarded and exchanged for another.
The weapon has a 30-round magazine and .45 caliber, so compared to the MP5 that uses a .40, it will do more damage, however, it will be less accurate.
You can either install it normally by replacing it (it will replace the MP5) or you can also install it without replacing it. (I recommend adding it for a better experience)
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