Comtacs are a double duty item, one is ear protection--but formost they are made for communication.
MSA has a line, been a while since I looked at them so the ID escapes me, but it is similar to Comtacs. But if I were to "buy once cry once" it would be the Peltors. Besides the batteries I have nothing against the sordins and if the battery is non existent issue, you'll be happy with them.
Pretty sure the sordins I own are a bit different to yours Scrapper, maybe the issues have been addressed.