Looking to buy Ruger Max-9 4” barrel only (no slide)

Hey everyone,

I’m looking for a Ruger Max-9 4-inch barrel only — no slide or frame — for a personal project. This is strictly for an experiment where I’m planning to have the barrel threaded to test a compensator/suppressor setup.

I’ve already checked Ruger’s parts store and a few online retailers, but I haven’t had much luck finding just the barrel without having to buy the whole upper assembly. If anyone has a spare they’re willing to sell, knows of a good source, or can point me toward a reputable aftermarket supplier/machinist, I’d appreciate it.

Thanks in advance for any leads!