The barrel is actually a blank steel tube (which you can order online) that uses ECM to make rifling grooves. https://en.wikipedia.org/wiki/Electroetching Currently you will still need a trigger group but an Airsoft one works just fine, they are working on plans for a 3d trigger afaik. There are current guns that have fired at least 1000rds with no major failures. Please keep in mind that most of these projects are for Europoors who can't get guns legally.