I heard that he was a scammer, but he made some good stuff and quite a few people have some of the great visors and guns he made.
the most complete info i found was on brickblogger.com. the amazing-armory homepage still isn't online ("coming soon") - just like it was about a half year ago when the article was written. at that time you could buy parts on bricklink.com and firsestartoys.com where i can't find them today.
the unavailability on bricklink in addition with the still-not-online webpage pretty much sounds like amazing armory is out of business - but i don't have facts that prove this speculation.