Quote Originally Posted by cinedux View Post
Has anyone changed a 6mm barrel for a 4.5mm one?;-)
I wouldn't bother, as given that the 6mm valve only allows less that 0.5ft.lb (and that is being generous) to propel a plastic BB, and all (that I know of, but am happy to be corrected) 4.5mm/.177 BBs are steel, the mechanics present on a 6mm soft air variant will scarcely generate enough power to get a steel BB to the end of the barrel -- let alone reach a 10m target -- so given the cost of the replacement barrel (if you could source one), the cost of the replacement shells, and the cost of re-valuing the power release, I wager it would be far cheaper to just sell your 6mm version then purchase a .177 model instead?