IIRC, a majority said they would do it.
Okay. I'm calling BS on that one. I spent 20 years in the Corps and I can say without a doubt that statement is utter BS!
Unfortunately, the majority of the younger soldiers agreed with this question:
46. The U.S. government declares a ban on the possession, sale, transportation, and transfer of all non-approved firearms. A 30-day amnesty period is established for these firearms to be turned over to the local authorities. At the end of this period, a number of irregular citizen groups and defiant individuals refuse to turn over their firearms to authority. Consider the following statement: [SD D A SA NO] "I would fire upon U.S. citizens who refuse or resist confiscation of firearms banned by the United States government."