First let me say there is no $500 one-time tax for unlimited transfers. There is a $500 yearly fee for a FFL to obtain a Class 3 SOT which allows them unlimited transfers for that year from other dealers for items owned by their FFL. This fee needs to be paid yearly and may be in addition to other fees necessary depending on what the FFL will be doing. If you are interested in setting up a FFL, please Contact Us as we can put you in touch with someone to help you create your FFL and have the systems necessary to not create problems with the BATFE. You can buy cheap products out there that will help create the FFL, but just because you create n FFL does not mean it will be done correctly and you will understand what your duties and responsibilities. Our package helps you protect yourself from unintentional violations.
In regards to personal ownership, it is unfortunate but you, your company, or your trust will need to pay $200 for each silencer you purchase.