I have a friend who recently came across a well-used police issue 659. The barrel looks pretty worn. Any good source for replacement barrels? Even a gently used one would be OK.
A barrel should be good for 50K plus rounds, most police guns never see anything close to that, but they do get beat around enough. Give a good cleaning(Something else that doesn't get done with LE trade-ins) and go shoot it and see before buying a barrel.