Form 1 is for you to "manufacture" an SBR or a suppressor. For an SBR the above info is correct. For a form 1 suppressor you can buy everything, just don't drill anything out until you have the approved form 1 (running about 3 weeks right now). Once it's approved you can bore/clip yourself or you can have an SOT do it for you.
I need to build one for my 450 Bushmaster.
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