I was researching something and happened to come across this reference to me, so I've joined so I can reply...the Johnson Rifles were indeed used in combat by Marine Paratroopers in World War II - first by the 1st Parachute Battalion at Gavutu and Guadalcanal during Aug-Sept 1942. Likewise by the 2nd Parachute Battalion on its Choiseul Raid in 1943 and to some degree by members of the 1st Para Bn on Bougainville in 1943; one photo which I sell of the Koiari Raid (29 Nov 1943) appears to show a Johnson Rifle...it is hard to see but the configuration of the barrel is quite possibly a Johnson Rifle. The Johnson Light Machine Guns were also used on the Koiari Raid and I have several accounts in one of my books, by Marine Paratroopers who used those weapons. Ken Haney - Jackson, TN
