Lahti’s rifle used a gas-piston action that fired the round through a 51.2-inch long barrel. Fed by a 10-shot detachable box magazine mounted on top of the receiver, the gun ejected spent rounds downward. This set up gave the gun a compact profile when firing from a prone position. Recoil was managed through a flat harmonica shaped muzzle break, padded rear stops, and two massive recoil springs. To ensure that the super heavy gun could be carried and set up rapidly, it was mounted on a pair of short stubby skis. This system allowed the whole affair to be set up on the forest floor or drug over thick snow effectively while still theoretically toted by a two to three man team if needed.