If you are 21 years of age or older, a citizen of the United States, and have no felony convictions, you may purchase a suppressor. You may buy on-line, at your local firearms retailer, or directly from the manufacturer if they are in your home state. If you have purchased your suppressor on-line, you would select and specify a local FFL (Federal Firearms Licensee) to provide in-state transfer for the suppressor, and the manufacturer will transfer the suppressor to them. On arrival, the local FFL will prepare a BATFE form 5320.4 packet for you. This will require a 2×2 color photograph of you, as well as a set of fingerprint cards for submittal to the BATFE for the required background check. You then send the form package to the BATFE along with the $200 federal tax. On approval (this varies based on BATFE backlog from 6-10 months), the FFL will receive authorization to transfer, along with the original tax stamp for the suppressor. Your local FFL may then issue the tax stamp to you with your suppressor. A copy of the tax stamp must be available with the suppressor at all times to be in legal possession. If you purchase a suppressor from your local FFL/dealer, the process is the same for submittal and approval. This is also true if you purchase directly from the manufacturer in your home state.