We have ATK operations here in my area. A few years back ATK spun off a division and a new entity was created, Vista Outdoor, which is publicly traded. They grew by acquisition into other consumer products, but they are mainly a munitions manufacturer for the outdoors industry, but also supply law enforcement and the military. Not sure this relates to anything you are researching, but as a spin off from ATK and their recently retired CEO who came from ATK might be an interesting add on to your research. Check them out here: https://vistaoutdoor.com/corporate-overview/
Thanks for the lengthy research you have done on this topic. It's a sad state of affairs in this dark subject.