With 50cals,I borrowed the real thing & its ground mount,which was sooooooooooo heavy.I must be getting old as in the 50cal vehicle TM for a ring mount its a 3-man lift,my replica is cast from ally & the barrel unscrews from the body,making a nice & light lift.On my replica,for two year's it had no hole in the barrel for the bullets to come out of it & no-one said anything,it being 12ft in the air I guess helps!