Aftermarket m1919 . I don't think it's a browning I've taken it apart and it does not say browning on any part. It was left in the weather for several years mounted on a military jeep the internals were/are rusted up . I've got most of it freed up and soaked in oil . I believe it will need a complete bolt and maybe a barrel the current barrel has some pitting in side . This belongs to my neighbor I'm listing it for him please ask any questions. I'm still learning about the gun it's belt fed and there are a bunch of chain links with it so you can assemble the belt fed ammo. Also has the jeep/vehicle mount tripod mount to go with it or sold separately 4300 for the package or 800 for the mount and 3500 for the gun