the prototype to be transported and submitted to the Ordnance Department by the deadline. The Ordnance trials were completed and the Winchester light rifle was adopted as the Carbine, Caliber .30, M1 Carbine on September 30, 1941. Williams had been unable to complete his own light rifle prototype in time for the trials. The prototype by Williams was a downsized version of his G30R design. Photographs of this carbine are retained by the Springfield Armory Museum and the Cody Firearms Museum Buffalo Bill Historical Center. Williams had previously entered into a license agreement with Winchester on September 9, 1940, for use of his patented short-stroke gas piston () in exchange for a royalty payable on the basis of the value of each gun manufactured containing the invention. From the end of 1941 and into 1942, Western Cartridge Co. (Winchester) negotiated with the Ordnance Department over the design of the M1 Carbine. In February 1942, the Ordnance Department proposed a one-time lump sum royalty payment of $886,000 in exchange for a royalty-free production license. On March 19, 1942, Williams voluntarily entered into another agreement with Winchester, accepting 26.411 percent of this lump sum ($234,100.46 over and above his salary) in lieu of royalty payments. Winchester signed the agreement on March 20, 1942. The contract for the M1 Carbine cited 14 patents as part of its design. Four of these were held by Williams as an assignor of Western Cartridge Company (Winchester). Two were related to the Model G30 (“Takedown Firearm” published December 7, 1943, and “Gas Operated Self-Loading Firearm” published April 18, 1944). The third was Winchester's patent for the M1 carbine itself (“Automatic Firearm Construction” published January 12, 1943) with Williams as the assignee. The fourth was the carbine's short-stroke gas piston (“Piston Means for Gas-Operated Firearms” published February 8, 1944). Winchester felt the earlier Williams patent for his floating chamber gas piston (“Automatic Firearm” ) was sufficiently different from the design used in the M1 carbine, and that they would have won an inevitable court battle with Williams. But they saw no point in it, as Winchester retained the patent rights with Williams as the company's assignee and the time taken by a court battle would be counterproductive to the overall goal of manufacturing the carbine for timely use by American forces already at war. Williams continued working at Winchester on the Model G30, a light machine-gun version known