Second Amendment scholar, David Kopel, makes the case in a Volokh Conspiracy article in the WAPO that an anti-gun regulation in effect since the Nixon administration may be in the process of being changed (it prohibited any weapons on Army Corps of Engineer land).
Due to the lawsuits by the Mountain States Legal Foundation, the Army Corps of Engineers has asked the courts to delay the lawsuits and allow them to enter mediation.You might think that a government unit called the “U.S. Army Corps of Engineers” would mainly perform projects such as building military forts and similar facilities. Yet the Corps of Engineers has acquired jurisdiction over many things that have nothing to do with the military. In particular, “The Corps of Engineers is the nation’s largest provider of water-based outdoor recreation. It administers 422 lake and river projects in 43 states, spanning 12 million acres, encompassing 55,000 miles of shoreline and 4,500 miles of trails, and including 90,000 campsites and 3,400 boat launch ramps. Waters under its control constitute 33 percent of all U.S. freshwater fishing.” (Here is a list of the Corps’ 1,969 recreational facilities.) Thanks to a lawsuit brought by the Mountain States Legal Foundation, the Corps has announced that it is reconsidering the gun ban on its outdoor property.
The Corps allows hunting on some of its land. Except for hunting, possession of a functional firearm is prohibited on Corps land — even a handgun inside one’s own tent.
Since the Obama Administration signed a Bill allowing guns in National Parks and Federal Wildlife Areas as a small part of a larger spending Bill, these Federal land areas have to follow State gun laws, and there has been little to no problems in National Parks by those with guns. That evidence is used by the Courts against the Army Corps of Engineers to declare their gun bans unconstitutional (but only in the States so far that were part of the lawsuits, like Idaho).
Summary: the Army Corps of Engineers may be working to change their regulations to mirror the National Parks gun law (guns being allowed on Army Corps of Engineers land, but in accordance with State gun laws, and banned inside Corps buildings and Dams).
We need to push for this regulation change, since it affects millions of people nationwide who use the Army Corps of Engineers land for recreation and who are currently banned from gun carry.