I purchased this barrel from Zev and it has been used less than 500 rounds. Never had a malfunction with this barrel. Selling for $125 shipped to offset a portion of the cost of a new threaded barrel. New, these are $261 – https://www.zevtechnologies.com/ZEV-Optimized-Match-Barrel-G19-Gen1-5-Bronze
Picture https://imgur.com/a/kRxyg5M