Reddit reviews WIX Filters - 24003 Heavy Duty Fuel (Complete In-Line) Filter, Pack of 1

Me and a friend spent quite a bit of time looking for off the shelf parts to use in a form 1 can and stumbled upon something quite remarkable. A 3/4 oz. jigger is an almost perfect fit in a NAPA 4003 fuel filter. Simply split it from the other end of the jigger, mount it in the chuck and bore a hole in the center. Then turn down a tube of 1.5" ID aluminum to fit inside and cut into sections for spacers. We have completed them and they have held up to 5.56 NATO and full power 300 Blackout without any problems. Oh, they work quite well too! Very quiet with subsonic 300 Blackout. I hope to make a DIY thread soon. This will have to do until I get some of the lathe pics.

Edit: Get can here

Get jiggers here

Split jiggers

Here's the jiggers after being separated.

Front and back of baffle and spacer.

Detail showing machining inside spacer to allow baffle to seat properly.

Two baffle stacks stacked.

First coat of paint! Here you can see we faced the end cap and knurled it. I also drilled two holes in the front of the cap so I could use a spanner wrench in case it gets stuck.

On one of the hosts. 300 Blackout pistol.

Tear down after a day at the range. Here you can see we milled the blast baffle to reduce weight. I hope to mill the spacers to further reduce weight. It is especially dirty because I used wire pulling gel on some subsonic ammo to see just how quiet it could get. Very impressive performance for the money spent.