Originally Posted by
HCM
Those are 80% kits for building a form 1 suppressor. Building firm 1 suppressors from kits has become increasingly popular because of the ridiculous year plus wait for acquiring a factory built suppressor via a form 4. You can e file a form 1 and have it approved in days allowing you to legally make a suppressor.
The legit 80% companies sell them as 80% suppressor kits though, none of this “filter” or “solvent trap” BS.
This has all the same potential issues as 80% receivers for firearms.