I recently got a TACM III (with remote pressure switch) for mounting on a shotgun. My totally unscientific testing was that it appeared identical in brightness to a Surefire 6Z, though the TACM had _slightly_ more of a bright spot and diffuse outer area than the Surefire. Not enough of a difference to matter to me.
If this light can hold up to several hundred rounds of buck and slugs, I'll say it is pretty durable.
So far, so good. And certainly a fairly priced item, and noticeably lighter than comparable sized Surefire units.
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