The Huot had a piston mounted parallel to the left side of the barrel. Actuated by gas pressure behind the bullet, it pushed the straight-pull bolt sleeve rearward. This, in turn, opened the breech by moving the bolt rearward. While the empty case was being removed [ie: ejected], an arm with positive motion rotated the moving parts of the magazine to line up a live round that was pushed forward by the bolt. The rotation of the movable interior part of the magazine was accomplished by the arm engaging a ratchet wheel at the top rear of the magazine and the bolt moved forward by a spring which was compressed when the breech opened. The cooling method and configuration indicated a copy of the system used on the Lewis gun....The gun could be belt fed by running the belt over the the magazine drum. It only weighed 33.25 lbs complete and loaded. The Ross Rifle Story, pps. 354-363.