It's Standard Catalog of Military Firearms, 6th Edition!
If you collect military firearms, your best insurance policy is to know what you're collecting and how much it's worth. There's no better source of this knowledge than the updated, revised 6th edition of Phillip Peterson's Standard Catalog of Military Firearms.
From handguns to rifles to shotguns and fully-automatic machineguns and submachineguns, Standard Catalog of Military Firearms provides a remarkable complete guide to the world's military firearms and their accessories.
It's all here: