IIRC it was used in WW1 in an aircraft. they had large cappacity mags
the gunner in the back seat would shoot at other aircraft and targets on the ground.
i rebuilt 2 of these a few years ago. gun parts corp still has parts for these. the
buffer washer should be changed on these old guns as they wear out. there is quite a
trick puting that spring back in after u change the buffer washer. hehehe.
jb