Available direct from the author: https://emmageeman.com/products/handbook-of-machine-gun-support-equipment-and-accessories-1895-1945-by-robert-g-segel Robert Segel, long-time editor of Small Arms Review magazine, has just published a book on machine gun accessories and equipment, and it's a very valuable new piece of reference material for the community. Mr. Segel has long been a machine gun collector, and has paid particular attention to accessories, tool kits, and that sort of ancillary gear.