I have a couple of Form 1 suppressors made using aluminum tubes and other readily available materials. They are suitable for rimfire calibers only as far as I'm concerned but they do work quite well.
If you build a Form 1 suppressor, you're gambling $200 that you can cobble together a workable can. If you don't happen to be an experienced machinist, that will cost you a pile of $$ to pay someone to do the machining, adding to your gamble.
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