The U.S. Model 1917 Enfield rifle was a variation of the design of a weapon Remington and Winchester had been making for the British. As it turned out the British cancelled the contracts when they decided to keep their SMLE .303 rifle for the duration of the war. After we declared war we changed the caliber to .30-06 and made it for ourselves. There were also a lot of American contracts for small arms and artillery ammunition, as well as lots of complaints by the British about the quality of it.

The British Lewis machine gun was the invention of a U.S. Army officer of ordnance who was on the personna non grata list of the then-chief of ordnance, which was the reason the U.S. Army did not adopt one of best MGs of the war.