What does that even mean? that they were created by the or for the Military? Does any body in VPC knows how to use Google? Hiram Maxim came up with the silencer and the car muffler about the same time in 1902. The War Department did not begin to look into silencers till March 1909.
And silencers were pretty much abandoned by the War Department October of the same year.
If your cause is righteous, why lie?