In the trenches-

[Father Ted]

I can't imagine how the recoil was transferred on these different periscope rifle designs. Like anything in the trenches it couldn't have been "comfy".

[Shooter5]

IIRC the only Coast Guardsman to receive the Medal of Honor used the Lewis gun protecting Marines during a landing/pickup on a Pacific island.

Yes, according to the article SM1c Douglas A. Munro, USCG:: "...Munro and Evans were in separate LCVP's, each with an air cooled Lewis .30 caliber machine gun and ammunition." His MOH citation does not mention the weapons used (although sometimes they do, for example, a 1911 or a Thompson.)

http://www.uscg.mil/history/weboralh...ralHistory.asp

[John Sukey]

Lets not forget the U.S. Gunboat Panay on the Yangzte river that was sunk by the Japs. Many years ago I met one of the crew of the Panay who fired his Lewis at the jap aircraft.
By the way, the Marines used the Lewis in WW1. General Crozier may have kept the army from getting it but he had no authority over the Marines