Trench Firing Device?

[breakeyp]

Attachment 109057Attachment 109058 I originally thought the rifle and fixture were coaxial training devices for artillery pieces. My rifle is commercial, not military and came from Faris. It actually is part of a massive training device that suspends the rifle and allows it to move in all directions. Designed and patented by H. H. Cummings. Attached is some drawings from the patent paperwork. I leave speculation as to how effective it was but I do note that not too many rifles have surfaced.