RE: w350
Kenny is correct, there were a lot of civilian models purchased by the government for their use that are not strictly military models. some are in use by other government agencies and others are used by the military and are sometimes painted military colors but are just civilian vehicles used on base. Some have data plates as Kenny stated, and others do not, but without an "M" series designation the are not a military spec model. The OD colored Ram may have just been used for grounds work or similar duties. I have even seen a Dodge Rampage front wheel drive car/truck thing with a data plate, but no M series number, lol...