I would like to end up with a 14" SBS Mossberg 590A1. This is my plan let me know if anyone sees a problem with this and / or if anyone has done it. 1) Buy a Mossberg 590A1 18" Shotgun. Probably 51518. 2) Do the Form 1 3) Get the receiver engraved 4) Order a 14" Ghost Ring Barrel for the 590A1. In looking on-line it looks like the mag tube setup / barrel attachment point is the same for the 18"/14" 590A1. Tax stamps issued resolved you could just pop the 18" off and the 14" on. Can anyone confirm this? I have done a SBR with an AR already so I am familiar with that process but want to make sure I will end up with the SBS I want without having to mod the receiver other then engraving or have to mod the mag tube setup. Thanks. Wanna kill these ads? We can help!