Oil filter silencer !

[Stewie]

I thought some of you might find this interesting

 

[CarbonSteel]

They are pretty cool, but if memory serves the oil filter is the actual suppressor and is the Class III device. In this US, this means you cannot simply replace the oil filter when it wears out, you have to return it to be rebuilt or face a visit to the cross bar motel.

 

[Dyusik]

Yup have to register the attachment as a suppressor. Expensive toy. Nothing more.

 

[zpinch]

Awesome.