From let to right, hammer case, motor housing, handle. The gun had eight bolts holding it together. All have been helicoiled. What's interesting is that the gun seems to have been put together from at least two different guns in the past. According to a buddy who rebuilds air tools on the side, the motor housing and handle are apparently from an IR2138, and the hammer and hammer case are from a hydraulic powered impact. Maybe a Stanley, or maybe something off a tank. Somebody took the time to find a couple that matched up just right. The motor housing and handle together weigh maybe a pound and a half or so. All aluminum, mostly hollow. The hammer case is between 1/4" and 3/8" steel all over, and weighs around seven or eight pounds enpty. No scale, so guesstimations abound.