A whole range of options are available from Amazon for "patch traps, filter traps, solvent traps." They're usually adapters that fit many popular barrel threads and adapt to oil filters, bottles, etc. They have a variety of different filters, adapters, contraptions, etc. But there's a reason why their language describing them is like it is. Just don't get caught using one on a weapon would be my advice.
Yeah, I was referring to purchasing what companies advertise as a "solvent trap," so that they can sell legally, and then form 1'ing it. I have zero interest in making an oil filter suppressor and doing something illegal. haha. I already have several form 4'd items that I've had for years now.
I have a good friend who form 1'ed one years ago, prior to their popularity rising, and it's been nothing but flawless for him. He has it on a .30 cal so it's not some humpty-dumpty rimfire can.
Seems like quietbore is the big name nowadays? Anyone worked with them? Reviews seem to rave about their products, but piss on their customer service. Then again, they're making solvent traps. If you choose to work with the BATFE to turn it into a suppressor, there isn't much "customer service" that quietbore can provide, right?