File:David marshall williams.jpg

Fair use rationale: This historic photo, which cannot be re-created, is not being used for profit but rather, only being used for informational and educational purposes in terms of a public policy matter substantially within the public interest of the people interested in firearms. Its inclusion in the article adds significantly to the substance of the article because the photo depicts the relationship of David Marshall Williams to his unique invention of the short-stroke piston used in the M1 Carbine as well as the floating chamber operating system for firearms.