Originally Posted by
QuietShootr
ATF has ruled repeatedly in the past that you can't possess suppressor components (such as wipes or sacrificial baffles) outside a registered tube. An oil filter is just an oil filter, until ATF decides that owning one in conjunction with one of these adapters is constructive possession of unregistered suppressor parts. And once a shot has been fired through the oil filter, it's definitely a suppressor part, so that leaves ATF a nice big loophole to butt**** somebody for possession of unregistered suppressor parts.
Buy one if you want, but just be aware you are vulnerable to ATF shenanigans, and maybe even have to surrender it like they did with the RPB MAC Coke-bottle adapters in the 80s. Only this time they'll have a real list of everyone that has one, since they'll be stamped.
Bad idea, IMO. But do what you want.