<https://forum.308ar.com/topic/24476-sonic-cleaner/#comment-360532>
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"I found this type at an estate sale at random years ago (the one in the picture is what I own). I didn't really \"need\" it for anything at the time; but it served me very well over the years. I believe everyone else can point you in a more useful direction.\n \n\n\n\tOn the other hand. And \"eyeglass cleaning\" ultrasonic will fit the bolt itself just fine. And a a good number of brass cases. \n \n\n\n\tYou can buy that particular one in the picture for $23 on eBay right now. It's not very large inside though... Can't fit a bolt carrier fully.\n \n\n\n\tAttached the MSDS for the cleaner I use. It doesn't really say much at all. My understanding is that it's a surfactant that allows the water molecules to slip by each other better. The water is what does the hammering in an ultrasonic; so they can go faster and hit harder with better lube. \n \n\n\n\tBlitzCleanerConcentrate.pdf\n \n"
<https://forum.308ar.com/topic/24476-sonic-cleaner/?tab=comments#comment-360562>