I could move the barrel short distances ,but that is all I wanted to do . It was bored out to 1.7 in , the barrel was about 36 in long and I made it from a 6in prop shaft out of a tug boat from Coos Bay, Oregon. Never did weigh it but think it was about 150 lbs. Yes it took two people to haul it up and down the stairs .I was taking Machine Tech in college so I was in the machine shop a lot. Made a new carriage for it later and eventually sold it .