Can you use an oil filter as a gun suppressor?

No, you can’t use an oil filter as a gun suppressor. While oil filters do trap some of the noise created by gunfire, they’re not designed to reduce noise in the same way that purpose-built suppressors do.

Oil filters aren’t airtight, so they don’t prevent all of the expanding gas from escaping when a shot is fired. This means that a lot of the noise generated by the gunshot will still escape, making it far from ideal for use as a suppressor. Additionally, oil filters can add significant length to a gun, making it unwieldy and difficult to handle. So while you might be able to rig up an oil filter to work as a crude suppressor, it’s not going to be as effective as a purpose-built one.