Hey all, I am interested in purchasing a suppressor for both my AR-15 (Gemtech G5) as well as my Walther P99 (SWR-trident9). I understand the steps to take towards acquiring these items however, I am a little confused about the $200 tax stamp. Once the stamp is acquired, does that mean you are free to purchase more NFA items (say, a second suppressor) without having to pay another $200? Or is it a $200 fee PER NFA item? (i.e. $200 + tax stamp for my Gemtech G5, and then another $200 + another tax stamp for the SWR-trident9?) Any help is appreciated, thanks!