Gun has 20 barrel Sendaro barrel, MPA BA chassis with internal and external weights, RZR G3 and MDT single pull bipod. Weighs 20.5lbs with the bipod on and balances perfect on a bag. I have no worries about walking away from the gun balanced on a bag. But take the bipod off (21oz) and its tail heavy enough I don't want to leave it sitting without holding onto it. I'd like to add a weight I can attach to the spigot mount with an arca adapter for stage where having the bipod on is not ideal. Guy I shot a match with here recently had a hunk of square stock steel welded to an adapter as ballast. Does anyone sell something like this?